remove Python2 some constructs/docs/comments (#10892)

* remove Python2 some constructs/docs/comments

* add changelog frag

plugins/module_utils/known_hosts.py

@@ -60,17 +60,14 @@ def get_fqdn_and_port(repo_url):
     elif "://" in repo_url:
         # this should be something we can parse with urlparse
         parts = urlparse(repo_url)
-        # parts[1] will be empty on python2.4 on ssh:// or git:// urls, so
-        # ensure we actually have a parts[1] before continuing.
-        if parts[1] != '':
-            fqdn = parts[1]
-            if "@" in fqdn:
-                fqdn = fqdn.split("@", 1)[1]
-            match = ipv6_re.match(fqdn)
-            if match:
-                fqdn, port = match.groups()
-            elif ":" in fqdn:
-                fqdn, port = fqdn.split(":")[0:2]
+        fqdn = parts[1]
+        if "@" in fqdn:
+            fqdn = fqdn.split("@", 1)[1]
+        match = ipv6_re.match(fqdn)
+        if match:
+            fqdn, port = match.groups()
+        elif ":" in fqdn:
+            fqdn, port = fqdn.split(":")[0:2]
     return fqdn, port