zulip_bots: Remove fallback code for Python < 3.5.

Signed-off-by: Anders Kaseorg <anders@zulip.com>

zulip_bots/zulip_bots/bots/monkeytestit/test_monkeytestit.py

@@ -1,12 +1,8 @@
 from unittest.mock import patch
-from unittest import skipIf
-
-from sys import version_info
 
 from importlib import import_module
 from zulip_bots.test_lib import BotTestCase, DefaultTests
 
-@skipIf(version_info[:2] < (3, 5), "monkeytestit requires python3.5+")
 class TestMonkeyTestitBot(BotTestCase, DefaultTests):
     bot_name = "monkeytestit"
 

zulip_bots/zulip_bots/finder.py

@@ -1,4 +1,5 @@
-import sys
+import importlib
+import importlib.util
 import os
 from typing import Any, Optional, Text, Tuple
 from pathlib import Path
@@ -6,25 +7,15 @@ from pathlib import Path
 current_dir = os.path.dirname(os.path.abspath(__file__))
 
 def import_module_from_source(path: Text, name: Text) -> Any:
-
-    # importlib.util.module_from_spec is supported from Python3.5
-    py_version = sys.version_info
-    if py_version.major < 3 or (py_version.major == 3 and py_version.minor < 5):
-        import imp
-        module = imp.load_source(name, path)
-    else:
-        import importlib.util
-        spec = importlib.util.spec_from_file_location(name, path)
-        module = importlib.util.module_from_spec(spec)
-        loader = spec.loader
-        if loader is None:
-            return None
-        loader.exec_module(module)  # type: ignore  # FIXME: typeshed issue?
-
+    spec = importlib.util.spec_from_file_location(name, path)
+    module = importlib.util.module_from_spec(spec)
+    loader = spec.loader
+    if loader is None:
+        return None
+    loader.exec_module(module)  # type: ignore  # FIXME: typeshed issue?
     return module
 
 def import_module_by_name(name: Text) -> Any:
-    import importlib
     try:
         return importlib.import_module(name)
     except ImportError: