remotenames: drop redundant templatekw names from help text

Also removed the second "List of" phrase, which is obvious from the type
"List of strings."

hgext/remotenames.py

@@ -228,9 +228,7 b' def reposetup(ui, repo):'
 
 @templatekeyword('remotenames')
 def remotenameskw(**args):
-    """:remotenames: List of strings. List of remote names associated with the
-    changeset.
-    """
+    """List of strings. Remote names associated with the changeset."""
     args = pycompat.byteskwargs(args)
     repo, ctx = args['repo'], args['ctx']
 
@@ -246,9 +244,7 b' def remotenameskw(**args):'
 
 @templatekeyword('remotebookmarks')
 def remotebookmarkskw(**args):
-    """:remotebookmarks: List of strings. List of remote bookmarks associated
-    with the changeset.
-    """
+    """List of strings. Remote bookmarks associated with the changeset."""
     args = pycompat.byteskwargs(args)
     repo, ctx = args['repo'], args['ctx']
 
@@ -261,9 +257,7 b' def remotebookmarkskw(**args):'
 
 @templatekeyword('remotebranches')
 def remotebrancheskw(**args):
-    """:remotebranches: List of strings. List of remote branches associated
-    with the changeset.
-    """
+    """List of strings. Remote branches associated with the changeset."""
     args = pycompat.byteskwargs(args)
     repo, ctx = args['repo'], args['ctx']