Remove a suppression that is necessary only when building Guava with JDK 8.

Guava continues to support users who build and run their own code under JDK 8; this is [only about how we build Guava ourselves](#6549).

RELNOTES=n/a
PiperOrigin-RevId: 802195145

Author: cpovirk

android/guava-tests/test/com/google/common/reflect/TypeTokenTest.java

@@ -1746,7 +1746,6 @@ Type type() {
     }
   }
 
-  @SuppressWarnings("RestrictedApiChecker") // crashes under JDK8, which EP no longer supports
   public <T> void testRejectTypeVariable_withOwnerType() {
     // Neither has subclass
     assertHasTypeVariable(new From<Integer>().new To<String>().type());

guava-tests/test/com/google/common/reflect/TypeTokenTest.java

@@ -1746,7 +1746,6 @@ Type type() {
     }
   }
 
-  @SuppressWarnings("RestrictedApiChecker") // crashes under JDK8, which EP no longer supports
   public <T> void testRejectTypeVariable_withOwnerType() {
     // Neither has subclass
     assertHasTypeVariable(new From<Integer>().new To<String>().type());