--- a/testing/marionette/client/marionette_driver/marionette.py
+++ b/testing/marionette/client/marionette_driver/marionette.py
@@ -1894,24 +1894,16 @@ class Marionette(object):
             assert "i'm a test function!" == self.marionette.execute_script("return testFunc();")
         """
         js = ""
         with open(js_file, "r") as f:
             js = f.read()
         body = {"script": js}
         self._send_message("importScript", body)
 
-    def clear_imported_scripts(self):
-        """Clears all imported scripts in this context, ie: calling
-        clear_imported_scripts in chrome context will clear only scripts
-        you imported in chrome, and will leave the scripts you imported
-        in content context.
-        """
-        self._send_message("clearImportedScripts")
-
     def add_cookie(self, cookie):
         """Adds a cookie to your current session.
 
         :param cookie: A dictionary object, with required keys - "name"
             and "value"; optional keys - "path", "domain", "secure",
             "expiry".
 
         Usage example:

--- a/testing/marionette/harness/marionette_harness/marionette_test/testcases.py
+++ b/testing/marionette/harness/marionette_harness/marionette_test/testcases.py
@@ -341,17 +341,16 @@ class MarionetteTestCase(CommonTestCase)
     def tearDown(self):
         # In the case no session is active (eg. the application was quit), start
         # a new session for clean-up steps.
         if not self.marionette.session:
             self.marionette.start_session()
 
         if not self.marionette.crashed:
             try:
-                self.marionette.clear_imported_scripts()
                 self.marionette.execute_script("log('TEST-END: {0}')"
                                                .format(self.test_name),
                                                sandbox="simpletest")
                 self.marionette.test_name = None
             except (MarionetteException, IOError):
                 # We have tried to log the test end when there is no listener
                 # object that we can access
                 pass