Remove g:rails_syntax

Replace it with the undocumented g:rails_no_syntax.

Author: tpope

autoload/rails.vim

@@ -3578,7 +3578,7 @@ endfunction
 call s:add_methods('app', ['user_classes','user_assertions'])
 
 function! s:BufSyntax()
-  if (!exists("g:rails_syntax") || g:rails_syntax)
+  if !exists("g:rails_no_syntax")
     let buffer = rails#buffer()
     let s:javascript_functions = "$ $$ $A $F $H $R $w jQuery"
     let classes = s:gsub(join(rails#app().user_classes(),' '),'::',' ')

doc/rails.txt

@@ -933,11 +933,6 @@ Use GNU Screen or Tmux (if it is running) to launch |:Rscript| console and
 Used for the |:Rpreview| command.  Default is as shown above.  Overridden by
 b:rails_url.
 
-						*g:rails_syntax*  >
-	let g:rails_syntax=1
-When enabled, this tweaks the syntax highlighting to be more Rails friendly.
-Enabled by default.  See |rails-syntax|.
-
 					*rails-tabs* *g:rails_tabstop*  >
 	let g:rails_tabstop=4
 This option now requires the plugin railstab.vim from vim.org:

plugin/rails.vim

@@ -48,7 +48,6 @@ function! s:SetOptDefault(opt,val)
   endif
 endfunction
 
-call s:SetOptDefault("rails_syntax",1)
 call s:SetOptDefault("rails_abbreviations",1)
 call s:SetOptDefault("rails_ctags_arguments","--languages=-javascript")
 call s:SetOptDefault("rails_default_file","README")