Add some missing @Override annotations, and remove some unused imports.

From #7916 / #7917

RELNOTES=n/a
PiperOrigin-RevId: 791773570

Author: Vincent Potucek

android/guava-testlib/test/com/google/common/collect/testing/IteratorTesterTest.java

@@ -18,7 +18,6 @@
 
 import static com.google.common.collect.Lists.newArrayList;
 import static com.google.common.collect.testing.IteratorFeature.MODIFIABLE;
-import static java.util.Collections.emptyList;
 
 import com.google.common.annotations.GwtCompatible;
 import com.google.common.collect.ImmutableList;

guava-gwt/src-super/com/google/common/cache/super/com/google/common/cache/LocalCache.java

@@ -349,10 +349,12 @@ public long getWriteTimestamp() {
       return writeTimestamp;
     }
 
+    @Override
     public boolean equals(Object o) {
       return value.equals(o);
     }
 
+    @Override
     public int hashCode() {
       return value.hashCode();
     }

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ForwardingImmutableCollection.java

@@ -48,6 +48,7 @@ public boolean containsAll(Collection<?> targets) {
     return delegate.containsAll(targets);
   }
 
+  @Override
   public int size() {
     return delegate.size();
   }

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ForwardingImmutableList.java

@@ -31,18 +31,22 @@ abstract class ForwardingImmutableList<E> extends ImmutableList<E> {
 
   abstract List<E> delegateList();
 
+  @Override
   public int indexOf(@Nullable Object object) {
     return delegateList().indexOf(object);
   }
 
+  @Override
   public int lastIndexOf(@Nullable Object object) {
     return delegateList().lastIndexOf(object);
   }
 
+  @Override
   public E get(int index) {
     return delegateList().get(index);
   }
 
+  @Override
   public ImmutableList<E> subList(int fromIndex, int toIndex) {
     return unsafeDelegateList(delegateList().subList(fromIndex, toIndex));
   }
@@ -79,6 +83,7 @@ public boolean containsAll(Collection<?> targets) {
     return delegateList().containsAll(targets);
   }
 
+  @Override
   public int size() {
     return delegateList().size();
   }

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ForwardingImmutableMap.java

@@ -49,22 +49,27 @@ public abstract class ForwardingImmutableMap<K, V> extends ImmutableMap<K, V> {
     this.delegate = Collections.unmodifiableMap(delegate);
   }
 
+  @Override
   boolean isPartialView() {
     return false;
   }
 
+  @Override
   public final boolean isEmpty() {
     return delegate.isEmpty();
   }
 
+  @Override
   public final boolean containsKey(@Nullable Object key) {
     return Maps.safeContainsKey(delegate, key);
   }
 
+  @Override
   public final boolean containsValue(@Nullable Object value) {
     return delegate.containsValue(value);
   }
 
+  @Override
   public @Nullable V get(@Nullable Object key) {
     return (key == null) ? null : Maps.safeGet(delegate, key);
   }

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableBiMap.java

@@ -196,6 +196,7 @@ public Builder<K, V> putAll(Iterable<? extends Entry<? extends K, ? extends V>>
     }
 
     @CanIgnoreReturnValue
+    @Override
     public Builder<K, V> orderEntriesByValue(Comparator<? super V> valueComparator) {
       super.orderEntriesByValue(valueComparator);
       return this;

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableCollection.java

@@ -39,36 +39,45 @@ public abstract class ImmutableCollection<E> extends AbstractCollection<E> imple
 
   ImmutableCollection() {}
 
+  @Override
   public abstract UnmodifiableIterator<E> iterator();
 
+  @Override
   public boolean contains(@Nullable Object object) {
     return object != null && super.contains(object);
   }
 
+  @Override
   public final boolean add(E e) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final boolean remove(@Nullable Object object) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final boolean addAll(Collection<? extends E> newElements) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final boolean removeAll(Collection<?> oldElements) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final boolean removeIf(Predicate<? super E> predicate) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final boolean retainAll(Collection<?> elementsToKeep) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final void clear() {
     throw new UnsupportedOperationException();
   }

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableList.java

@@ -231,18 +231,22 @@ public int lastIndexOf(@Nullable Object object) {
     return (object == null) ? -1 : Lists.lastIndexOfImpl(this, object);
   }
 
+  @Override
   public final boolean addAll(int index, Collection<? extends E> newElements) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final E set(int index, E element) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final void add(int index, E element) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final E remove(int index) {
     throw new UnsupportedOperationException();
   }

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableMap.java

@@ -402,18 +402,22 @@ public static <K, V> ImmutableMap<K, V> copyOf(
 
   abstract boolean isPartialView();
 
+  @Override
   public final @Nullable V put(K k, V v) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final @Nullable V remove(Object o) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final void putAll(Map<? extends K, ? extends V> map) {
     throw new UnsupportedOperationException();
   }
 
+  @Override
   public final void clear() {
     throw new UnsupportedOperationException();
   }
@@ -435,6 +439,7 @@ public boolean containsValue(@Nullable Object value) {
 
   private transient @Nullable ImmutableSet<Entry<K, V>> cachedEntrySet = null;
 
+  @Override
   public final ImmutableSet<Entry<K, V>> entrySet() {
     if (cachedEntrySet != null) {
       return cachedEntrySet;
@@ -446,6 +451,7 @@ public final ImmutableSet<Entry<K, V>> entrySet() {
 
   private transient @Nullable ImmutableSet<K> cachedKeySet = null;
 
+  @Override
   public ImmutableSet<K> keySet() {
     if (cachedKeySet != null) {
       return cachedKeySet;
@@ -478,6 +484,7 @@ Spliterator<K> keySpliterator() {
 
   private transient @Nullable ImmutableCollection<V> cachedValues = null;
 
+  @Override
   public ImmutableCollection<V> values() {
     if (cachedValues != null) {
       return cachedValues;

guava-gwt/src-super/com/google/common/collect/super/com/google/common/collect/ImmutableSet.java

@@ -198,6 +198,7 @@ public ImmutableList<E> asList() {
       }
     }
 
+    @Override
     ImmutableList<E> createAsList() {
       return new RegularImmutableAsList<E>(this, toArray());
     }