Remove what remains of filetype auto-detection

syntax/stxRuby.go

@@ -5,11 +5,6 @@ package syntax
 func init() {
 	syntaxMap["ruby"] = &lazySyntax{init: func() []byte {
 		return []byte(`filetype: ruby
-
-detect:
-    filename: "\\.rb$|\\.ru|\\.rbx|\\.rake|\\.gemspec$|Gemfile|Rakefile|Capfile|Vagrantfile"
-    header: "^#!.*/(env +)?ruby( |$)"
-
 rules:
     - statement: "\\b(BEGIN|END|alias|and|begin|break|case|class|def|defined\\?|do|else|elsif|end|ensure|false|for|if|in|module|next|nil|not|or|redo|rescue|retry|return|self|super|then|true|undef|unless|until|when|while|yield)\\b"
     - constant: "(\\$|@|@@)?\\b[A-Z]+[0-9A-Z_a-z]*"