remove unsed code

Author: Aaron Echavarria

src/main/java/io/jenkins/plugins/gitlabserverconfig/servers/GitLabServer.java

@@ -171,8 +171,6 @@ public class GitLabServer extends AbstractDescribableImpl<GitLabServer> {
      *                      credentials to use for
      *                      GitLab Server Authentication to access GitLab APIs
      */
-    private Integer indexingTimeout = 3600;
-
     @DataBoundConstructor
     public GitLabServer(@NonNull String serverUrl, @NonNull String name, @NonNull String credentialsId) {
         this.serverUrl = defaultIfBlank(StringUtils.trim(serverUrl), GITLAB_SERVER_URL);
@@ -494,16 +492,6 @@ public Integer getHookTriggerDelay() {
         return this.hookTriggerDelay;
     }
 
-    @CheckForNull
-    public Integer getIndexingTimeout() {
-        return indexingTimeout;
-    }
-
-    @DataBoundSetter
-    public void setIndexingTimeout(Integer indexingTimeout) {
-        this.indexingTimeout = indexingTimeout;
-    }
-
     /**
      * Our descriptor.
      */