Remove rust_colorcolumn, set textwidth to 99

The latest change to aturon/rust-guidelines states that lines must not
exceed 99 characters. This gets rid of the 80/100 split, so we don't
need to customize colorcolumn amymore.

Author: lilyball

src/etc/vim/doc/rust.txt

@@ -34,12 +34,6 @@ g:rustc_makeprg_no_percent~
 	    let g:rustc_makeprg_no_percent = 1
 <
 
-                                                          *g:rust_colorcolumn*
-g:rust_colorcolumn~
-	Set this option to use 'colorcolumn' to highlight the text width
-	indicate the 100 column recommended hard limit on line lengths: >
-	    let g:rust_colorcolumn = 1
-<
                                                               *g:rust_conceal*
 g:rust_conceal~
 	Set this option to turn on the basic |conceal| support: >

src/etc/vim/ftplugin/rust.vim

@@ -2,7 +2,7 @@
 " Description:  Vim syntax file for Rust
 " Maintainer:   Chris Morgan <me@chrismorgan.info>
 " Maintainer:   Kevin Ballard <kevin@sb.org>
-" Last Change:  July 06, 2014
+" Last Change:  Jul 07, 2014
 
 if exists("b:did_ftplugin")
 	finish
@@ -37,22 +37,7 @@ setlocal smartindent nocindent
 
 setlocal tabstop=4 shiftwidth=4 softtabstop=4 expandtab
 
-" Line lengths {{{2
-
-" Rust style conventions for line lengths say you SHOULD not go over 80
-" columns and MUST not go over 100.
-" Without a good 'formatexpr' we can't automatically wrap code, but we can
-" still wrap comments just fine with 'textwidth'.
-setlocal textwidth=80
-
-" We can also use 'colorcolumn' to highlight both the 80 and 100 limits. Not
-" everyone likes this so it's gated.
-if exists('g:rust_colorcolumn')
-	setlocal colorcolumn=+1,101
-	let b:rust_colorcolumn=1
-endif
-
-" }}}2
+setlocal textwidth=99
 
 " This includeexpr isn't perfect, but it's a good start
 setlocal includeexpr=substitute(v:fname,'::','/','g')
@@ -112,10 +97,6 @@ endif
 let b:undo_ftplugin = "
 		\ setlocal formatoptions< comments< commentstring< includeexpr< suffixesadd<
 		\|setlocal tabstop< shiftwidth< softtabstop< expandtab< textwidth<
-		\|if exists('b:rust_colorcolumn')
-		  \|setlocal colorcolumn<
-		  \|unlet b:rust_colorcolumn
-		\|endif
 		\|if exists('b:rust_original_delimitMate_excluded_regions')
 		  \|let b:delimitMate_excluded_regions = b:rust_original_delimitMate_excluded_regions
 		  \|unlet b:rust_original_delimitMate_excluded_regions