Remove stephpy/vim-yaml syntax

It causes issues:
- https://github.com/dracula/vim/pull/163
- https://github.com/stephpy/vim-yaml/issues/22

README.md

@@ -7,7 +7,7 @@ A collection of language packs for Vim.
 > One to rule them all, one to find them, one to bring them all and in the darkness bind them.
 
 - It **won't affect your startup time**, as scripts are loaded only on demand\*.
-- It **installs and updates 120+ times faster** than the <!--Package Count-->192<!--/Package Count--> packages it consists of.
+- It **installs and updates 120+ times faster** than the <!--Package Count-->191<!--/Package Count--> packages it consists of.
 - It is more secure because scripts loaded for all extensions are generated by vim-polyglot (ftdetect).
 - Solid syntax and indentation support (other features skipped). Only the best language packs.
 - All unnecessary files are ignored (like enormous documentation from php support).
@@ -229,7 +229,6 @@ If you need full functionality of any plugin, please use it directly with your p
 - [xdc](https://github.com/amal-khailtash/vim-xdc-syntax)
 - [xml](https://github.com/amadeus/vim-xml)
 - [xsl](https://github.com/vim-scripts/XSLT-syntax)
-- [yaml-extras](https://github.com/stephpy/vim-yaml)
 - [yaml](https://github.com/vim/vim/tree/df44a27b53586fccfc6a3aedc89061fdd9a515ff/runtime)
 - [yard](https://github.com/sheerun/vim-yardoc)
 - [zephir](https://github.com/xwsoul/vim-zephir)

after/ftplugin/yaml.vim

@@ -1,11 +0,0 @@
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml-extras') == -1
-
-" Vim indent file
-" Language: Yaml
-" Author: Henrique Barcelos
-" Date: 2014-10-08
-" URL: https://github.com/hjpbarcelos
-setlocal autoindent sw=2 ts=2 expandtab
-" vim:set sw=2:
-
-endif

after/syntax/yaml.vim

@@ -1,65 +0,0 @@
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'yaml-extras') == -1
-
-" To make this file do stuff, add something like the following (without the
-" leading ") to your ~/.vimrc:
-" au BufNewFile,BufRead *.yaml,*.yml so ~/src/PyYaml/YAML.vim
-
-" Vim syntax/macro file
-" Language:	YAML
-" Author:	Igor Vergeichik <iverg@mail.ru>
-" Sponsor: Tom Sawyer <transami@transami.net>
-" Stayven: Ryan King <jking@panoptic.com>
-" Copyright (c) 2002 Tom Saywer
-
-" Add an item to a gangly list:
-"map , o<bs><bs><bs><bs>-<esc>o
-" Convert to Canonical form:
-"map \c :%!python -c 'from yaml.redump import redump; import sys; print redump(sys.stdin.read()).rstrip()'
-
-if version < 600
-  syntax clear
-endif
-syntax clear
-
-syn match yamlInline "[\[\]\{\}]"
-syn match yamlBlock "[>|]\d\?[+-]"
-
-syn region yamlComment	start="\#" end="$"
-syn match yamlIndicator	"#YAML:\S\+"
-
-syn region yamlString	start="\(^\|\s\|\[\|\,\|\-\)\@<='" end="'" skip="\\'"
-syn region yamlString	start='"' end='"' skip='\\"' contains=yamlEscape
-syn region yamlString	matchgroup=yamlBlock start=/[>|]\s*\n\+\z(\s\+\)\S/rs=s+1 skip=/^\%(\z1\S\|^$\)/ end=/^\z1\@!.*/me=s-1
-syn region yamlString	matchgroup=yamlBlock start=/[>|]\(\d\|[+-]\)\s*\n\+\z(\s\+\)\S/rs=s+2 skip=/^\%(\z1\S\|^$\)/ end=/^\z1\@!.*/me=s-1
-syn region yamlString	matchgroup=yamlBlock start=/[>|]\d\(\d\|[+-]\)\s*\n\+\z(\s\+\)\S/rs=s+3 skip=/^\%(\z1\S\|^$\)/ end=/^\z1\@!.*/me=s-1
-syn match  yamlEscape	+\\[abfnrtv'"\\]+ contained
-syn match  yamlEscape	"\\\o\o\=\o\=" contained
-syn match  yamlEscape	"\\x\x\+" contained
-
-syn match  yamlType	"!\S\+"
-
-syn keyword yamlConstant NULL Null null NONE None none NIL Nil nil
-syn keyword yamlConstant TRUE True true YES Yes yes ON On on
-syn keyword yamlConstant FALSE False false NO No no OFF Off off
-
-syn match  yamlKey	"^\s*\zs[^ \t\"\'#]\+\ze\s*:"
- syn match  yamlKey	"^\s*-\s*\zs[^ \t\"\'#]\+\ze\s*:"
-syn match  yamlAnchor	"&\S\+"
-syn match  yamlAlias	"*\S\+"
-
-" Setup the highlighting links
-
-hi link yamlConstant Keyword
-hi link yamlIndicator PreCondit
-hi link yamlAnchor	Function
-hi link yamlAlias	Function
-hi link yamlKey		Identifier
-hi link yamlType	Type
-
-hi link yamlComment	Comment
-hi link yamlInline	Operator
-hi link yamlBlock	Operator
-hi link yamlString	String
-hi link yamlEscape	Special
-
-endif

packages.yaml

@@ -1661,11 +1661,6 @@ filetypes:
   - fish_read_history
   ignored_filenames:
   - '~/.config/fish/fish_{read_,}history'
----
-name: yaml-extras
-remote: stephpy/vim-yaml
-after: yaml
-filetypes: []
 # Ansible needs to be after YAML
 ---
 name: ansible