Suppressing unnecessary annotation

Author: jeromepochat

src/main/java/org/jenkinsci/plugins/github_branch_source/GitHubAppCredentials.java

@@ -103,7 +103,6 @@ public class GitHubAppCredentials extends BaseStandardCredentials implements Sta
 
     private String apiUri;
 
-    @SuppressFBWarnings(value = "IS2_INCONSISTENT_SYNC", justification = "#withOwner locking only for #byOwner")
     @Deprecated
     private String owner;