ImagesCollection: Remove unnecessary warning suppression

Change-Id: I24bf9ff3672e5e3c277edcd3a8f5e3111180c5e7

src/main/java/com/googlesource/gerrit/plugins/imagare/ImagesCollection.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/imagare/ImagesCollection.java b/src/main/java/com/googlesource/gerrit/plugins/imagare/ImagesCollection.java
index 992bbff..2edaae3 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/imagare/ImagesCollection.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/imagare/ImagesCollection.java
@@ -67,7 +67,6 @@
   }
 
   @Override
-  @SuppressWarnings("unchecked")
   public PostImage post(ProjectResource parent) throws RestApiException {
     return createImage.get();
   }