Checkstyle fixes (#12339)

- Added missing default sections to switch blocks.
- Added missing JavaDocs and JavaDoc parameters.
- Added wildcards where possible.
- Deprecated unused method.
- Fixed JavaDoc formatting.
- Removed inner assignments.
- Removed unused imports.
- Removed unused variables.
- Removed warning suppressions that were unnecessary or about boxing
(not tracked by coding conventions).
- Suppressed warnings about rawtypes, deprecation, and unchecked where
couldn't be avoided.

1 files changed, 0 insertions, 3 deletions

diff --git a/server/src/main/java/com/vaadin/ui/dnd/FileDropTarget.java b/server/src/main/java/com/vaadin/ui/dnd/FileDropTarget.java
index 311bcebb34..aebd393b5f 100644
--- a/server/src/main/java/com/vaadin/ui/dnd/FileDropTarget.java
+++ b/server/src/main/java/com/vaadin/ui/dnd/FileDropTarget.java
@@ -169,18 +169,15 @@ public class FileDropTarget<T extends AbstractComponent>
      * @return Extended component.
      */
     @Override
-    @SuppressWarnings("unchecked")
     public T getParent() {
         return super.getParent();
     }
 
     private class FileReceiver implements StreamVariable {
 
-        private final String id;
         private Html5File file;
 
         public FileReceiver(String id, Html5File file) {
-            this.id = id;
             this.file = file;
         }