Temporarily revert c119d54

There were bugs in this that needed to be resolved.  No time to get the
fix reviewed sufficiently for 2.6.0.

We'll get this into 2.7.0 and try to get this into 2.6.1 as well.

Will need the work done in https://github.com/ansible/ansible/pull/36218
when it does get merged.

lib/ansible/modules/net_tools/basics/get_url.py

@@ -49,8 +49,7 @@ options:
   tmp_dest:
     description:
       - Absolute path of where temporary file is downloaded to.
-      - When run on Ansible 2.5 or greater, path defaults to ansible's remote_tmp setting
-      - When run on Ansible prior to 2.5, it defaults to C(TMPDIR), C(TEMP) or C(TMP) env variables or a platform specific value.
+      - Defaults to C(TMPDIR), C(TEMP) or C(TMP) env variables or a platform specific value.
       - U(https://docs.python.org/2/library/tempfile.html#tempfile.tempdir)
     version_added: '2.1'
   force:
@@ -341,17 +340,18 @@ def url_get(module, url, dest, use_proxy, last_mod_time, force, timeout=10, head
                 module.fail_json(msg="%s is a file but should be a directory." % tmp_dest)
             else:
                 module.fail_json(msg="%s directory does not exist." % tmp_dest)
-    else:
-        tmp_dest = getattr(module, 'tmpdir', None)
 
-    fd, tempname = tempfile.mkstemp(dir=tmp_dest)
+        fd, tempname = tempfile.mkstemp(dir=tmp_dest)
+    else:
+        fd, tempname = tempfile.mkstemp()
 
     f = os.fdopen(fd, 'wb')
     try:
         shutil.copyfileobj(rsp, f)
     except Exception as e:
         os.remove(tempname)
-        module.fail_json(msg="failed to create temporary content file: %s" % to_native(e), exception=traceback.format_exc())
+        module.fail_json(msg="failed to create temporary content file: %s" % to_native(e),
+                         exception=traceback.format_exc())
     f.close()
     rsp.close()
     return tempname, info