remove plugin.hook check

src/topics.js

@@ -326,12 +326,8 @@ Topics.isLocked = function (tid, callback) {
 };
 
 Topics.search = function (tid, term, callback) {
-	if (plugins.hasListeners('filter:topic.search')) {
-		plugins.fireHook('filter:topic.search', {
-			tid: tid,
-			term: term,
-		}, callback);
-	} else {
-		callback(new Error('[[error:no-plugins-available]]'), []);
-	}
+	plugins.fireHook('filter:topic.search', {
+		tid: tid,
+		term: term,
+	}, callback);
 };

test/topics.js

@@ -1505,13 +1505,6 @@ describe('Topic\'s', function () {
 			});
 		});
 
-		it('should error if no search plugin', function (done) {
-			socketTopics.search({ uid: adminUid }, { tid: topic.tid, term: 'test' }, function (err) {
-				assert.equal(err.message, '[[error:no-plugins-available]]');
-				done();
-			});
-		});
-
 		it('should return results', function (done) {
 			var plugins = require('../src/plugins');
 			plugins.registerHook('myTestPlugin', {