[mod] remove dead code

tests/test_robot.py

@@ -1,23 +0,0 @@
-# -*- coding: utf-8 -*-
-
-import os
-import unittest2 as unittest
-from plone.testing import layered
-from robotsuite import RobotTestSuite
-from searx.testing import SEARXROBOTLAYER
-
-
-def test_suite():
-    suite = unittest.TestSuite()
-    current_dir = os.path.abspath(os.path.dirname(__file__))
-    robot_dir = os.path.join(current_dir, 'robot')
-    tests = [
-        os.path.join('robot', f) for f in
-        os.listdir(robot_dir) if f.endswith('.robot') and
-        f.startswith('test_')
-    ]
-    for test in tests:
-        suite.addTests([
-            layered(RobotTestSuite(test), layer=SEARXROBOTLAYER),
-        ])
-    return suite