Deleting unused method existsHook.

Author: jglick

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

@@ -48,18 +48,6 @@ public class GitHubOrgWebHook {
     private static final Logger LOGGER = Logger.getLogger(GitHubOrgWebHook.class.getName());
     private static final List<GHEvent> EVENTS = Arrays.asList(GHEvent.REPOSITORY, GHEvent.PUSH, GHEvent.PULL_REQUEST, GHEvent.PULL_REQUEST_REVIEW_COMMENT);
 
-    /**
-     * Verify if exists a webhook by its URL.
-     */
-    private static boolean existsHook(GHOrganization org, String url) throws IOException {
-        for (GHHook hook : org.getHooks()) {
-            if (hook.getConfig().get("url").equals(url)) {
-                return true;
-            }
-        }
-        return false;
-    }
-
     public static void register(GitHub hub, String orgName) throws IOException {
         String rootUrl = System.getenv("JENKINS_HOOK_URL");
         if (rootUrl == null) {