forget: add a note to the command help about remove

mercurial/commands.py

@@ -3332,6 +3332,8 b' def forget(ui, repo, *pats, **opts):'
     entire project history, and it does not delete them from the
     working directory.
 
+    To delete the file from the working directory, see :hg:`remove`.
+
     To undo a forget before the next commit, see :hg:`add`.
 
     .. container:: verbose