Remove redundant 'final' modifiers

The 'final' modifier is redundant on private members, and
on members of 'final' classes.

Change-Id: Ib89f00f3c839cc58be26bc58a2acae8d095bcbc7

gerrit-gpg/src/main/java/com/google/gerrit/gpg/server/PostGpgKeys.java

@@ -246,7 +246,7 @@ public class PostGpgKeys implements RestModifyView<AccountResource, Input> {
     }
   }
 
-  private final AccountExternalId.Key toExtIdKey(byte[] fp) {
+  private AccountExternalId.Key toExtIdKey(byte[] fp) {
     return new AccountExternalId.Key(
         AccountExternalId.SCHEME_GPGKEY,
         BaseEncoding.base16().encode(fp));