Cleanup GenerateAdapters annotation placements

Author: Rexios80

hive/README.md

@@ -233,12 +233,8 @@ Usually this is placed in `lib/hive/hive_adapters.dart`
 import 'package:hive_ce/hive.dart';
 import 'person.dart';
 
-part 'hive_adapters.g.dart';
-
 @GenerateAdapters([AdapterSpec<Person>()])
-// Annotations must be on some element
-// ignore: unused_element
-void _() {}
+part 'hive_adapters.g.dart';
 
 ```
 

hive/example/lib/hive/hive_adapters.dart

@@ -2,12 +2,8 @@ import 'package:example/freezed.dart';
 import 'package:example/main.dart';
 import 'package:hive_ce/hive.dart';
 
-part 'hive_adapters.g.dart';
-
 @GenerateAdapters([
   AdapterSpec<Person>(),
   AdapterSpec<FreezedPerson>(),
 ])
-// This is for code generation
-// ignore: unused_element
-void _() {}
+part 'hive_adapters.g.dart';

hive/readme/store_objects/hive_adapters.dart

@@ -1,9 +1,5 @@
 import 'package:hive_ce/hive.dart';
 import 'person.dart';
 
-part 'hive_adapters.g.dart';
-
 @GenerateAdapters([AdapterSpec<Person>()])
-// Annotations must be on some element
-// ignore: unused_element
-void _() {}
+part 'hive_adapters.g.dart';

hive_generator/example/lib/hive/hive_adapters.dart

@@ -1,7 +1,5 @@
 import 'package:hive_ce/hive.dart';
 
-part 'hive_adapters.g.dart';
-
 @GenerateAdapters(
   [
     AdapterSpec<ClassSpec1>(),
@@ -10,9 +8,7 @@ part 'hive_adapters.g.dart';
   ],
   firstTypeId: 50,
 )
-// This is for code generation
-// ignore: unused_element
-void _() {}
+part 'hive_adapters.g.dart';
 
 class ClassSpec1 {
   final int value;

hive_generator/lib/src/builder/schema_migrator_builder.dart

@@ -161,14 +161,10 @@ class SchemaMigratorBuilder implements Builder {
 import 'package:hive_ce/hive.dart';
 $imports
 
-part 'hive_adapters.g.dart';
-
 @GenerateAdapters([
   $specs,
 ])
-// This is for code generation
-// ignore: unused_element
-void _() {}
+part 'hive_adapters.g.dart';
 ''',
     );
 

hive_generator/test/schema_migrator_test.dart

@@ -85,17 +85,13 @@ import 'package:hive_ce/hive.dart';
 import 'package:hive_ce_generator_test/adapters.dart';
 import 'package:hive_ce_generator_test/adapters_2.dart';
 
-part 'hive_adapters.g.dart';
-
 @GenerateAdapters([
   AdapterSpec<Class2>(),
   AdapterSpec<Class1>(),
   AdapterSpec<Class3>(),
   AdapterSpec<Enum>(),
 ])
-// This is for code generation
-// ignore: unused_element
-void _() {}
+part 'hive_adapters.g.dart';
 ''',
           'lib/hive/hive_adapters.g.yaml': '''
 $schemaComment
@@ -255,14 +251,10 @@ class Class with _\$Class {
 import 'package:hive_ce/hive.dart';
 import 'package:hive_ce_generator_test/adapters.dart';
 
-part 'hive_adapters.g.dart';
-
 @GenerateAdapters([
   AdapterSpec<Class>(),
 ])
-// This is for code generation
-// ignore: unused_element
-void _() {}
+part 'hive_adapters.g.dart';
 ''',
           'lib/hive/hive_adapters.g.yaml': '''
 $schemaComment