Fix missing closing braces in Delete handlers

Fix compilation errors caused by missing or malformed class-closing braces
  in three Delete handler classes. These syntax errors prevented the classes
  from compiling properly.

  Changes:
  - DeleteTrackHasGenreHandler: Remove duplicate closing brace at line 62
    and ensure proper class-closing brace structure
  - DeleteTrackHasArtistHandler: Add missing class-closing brace at end of file
  - DeleteTrackHasComposerHandler: Add missing class-closing brace at end of file

  All three handlers now have correct brace structure:
    - Catch block closing brace (8 spaces indentation)
    - handle() method closing brace (4 spaces indentation)
    - Class closing brace (0 spaces indentation)

  This ensures all three classes compile successfully without syntax errors.

  Modified:
  - src/main/java/com/mediamanager/service/delegate/handler/trackhasgenre/DeleteTrackHasGenreHandler.java
  - src/main/java/com/mediamanager/service/delegate/handler/trackhasartist/DeleteTrackHasArtistHandler.java
  - src/main/java/com/mediamanager/service/delegate/handler/trackhascomposer/DeleteTrackHasComposerHandler.java

  🤖 Generated with [Claude Code](https://claude.com/claude-code)

  Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/main/java/com/mediamanager/service/delegate/handler/trackhasartist/DeleteTrackHasArtistHandler.java

@@ -59,3 +59,4 @@ public class DeleteTrackHasArtistHandler implements ActionHandler {
                     .setPayload(deleteResponse.toByteString());
         }
     }
+}

src/main/java/com/mediamanager/service/delegate/handler/trackhascomposer/DeleteTrackHasComposerHandler.java

@@ -59,3 +59,4 @@ public class DeleteTrackHasComposerHandler implements ActionHandler {
                     .setPayload(deleteResponse.toByteString());
         }
     }
+}