repo: Remove unreachable code.

Change-Id: I41371feb88c85e9da0656b9fab04057c22d1dcf4
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/391514
Tested-by: Jason R. Coombs <jaraco@google.com>
Reviewed-by: Mike Frysinger <vapier@google.com>
Commit-Queue: Jason R. Coombs <jaraco@google.com>

repo

@@ -79,17 +79,6 @@ def check_python_version():
     major = ver.major
     minor = ver.minor
 
-    # Abort on very old Python 2 versions.
-    if (major, minor) < (2, 7):
-        print(
-            "repo: error: Your Python version is too old. "
-            "Please use Python {}.{} or newer instead.".format(
-                *MIN_PYTHON_VERSION_SOFT
-            ),
-            file=sys.stderr,
-        )
-        sys.exit(1)
-
     # Try to re-exec the version specific Python 3 if needed.
     if (major, minor) < MIN_PYTHON_VERSION_SOFT:
         # Python makes releases ~once a year, so try our min version +10 to help
@@ -134,16 +123,7 @@ def check_python_version():
             reexec("python3")
 
         # We're still here, so diagnose things for the user.
-        if major < 3:
-            print(
-                "repo: error: Python 2 is no longer supported; "
-                "Please upgrade to Python {}.{}+.".format(
-                    *MIN_PYTHON_VERSION_HARD
-                ),
-                file=sys.stderr,
-            )
-            sys.exit(1)
-        elif (major, minor) < MIN_PYTHON_VERSION_HARD:
+        if (major, minor) < MIN_PYTHON_VERSION_HARD:
             print(
                 "repo: error: Python 3 version is too old; "
                 "Please use Python {}.{} or newer.".format(
@@ -170,7 +150,7 @@ if not REPO_REV:
 BUG_URL = "https://issues.gerritcodereview.com/issues/new?component=1370071"
 
 # increment this whenever we make important changes to this script
-VERSION = (2, 39)
+VERSION = (2, 40)
 
 # increment this if the MAINTAINER_KEYS block is modified
 KEYRING_VERSION = (2, 3)
@@ -274,19 +254,8 @@ import optparse
 import re
 import shutil
 import stat
-
-
-if sys.version_info[0] == 3:
-    import urllib.error
-    import urllib.request
-else:
-    import imp
-
-    import urllib2
-
-    urllib = imp.new_module("urllib")
-    urllib.request = urllib2
-    urllib.error = urllib2
+import urllib.error
+import urllib.request
 
 
 repo_config_dir = os.getenv("REPO_CONFIG_DIR", os.path.expanduser("~"))