Remove redundant check for escaped backslash
Remove redundant check for escaped backslash

Regex checking is now better, which is the only place a backslash could be escaped.

zartata/minify,n054/minify,jianlinwei/minify,viniciusferreira/minify,matthiasmullie/minify,jianlinwei/minify,matthiasmullie/minify,n054/minify,zartata/minify,viniciusferreira/minify,n054/minify