Revert inlining basic language pack

ftplugin/hgcommit.vim

@@ -1,20 +0,0 @@
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'vim') == -1
-  
-" Vim filetype plugin file
-" Language:	hg (Mercurial) commit file
-" Maintainer:	Ken Takata <kentkt at csc dot jp>
-" Last Change:	2016 Jan 6
-" Filenames:	hg-editor-*.txt
-" License:	VIM License
-" URL:		https://github.com/k-takata/hg-vim
-
-if exists("b:did_ftplugin")
-  finish
-endif
-let b:did_ftplugin = 1
-
-setlocal nomodeline
-
-let b:undo_ftplugin = 'setl modeline<'
-
-endif