Removed the YAML file since I wasn't using it

Docker-DCO-1.1-Signed-off-by: Asbjorn Enge <asbjorn@hanafjedle.net> (github: asbjornenge)

contrib/syntax/textmate/Dockerfile.YAML-tmLanguage

@@ -1,23 +0,0 @@
-# [PackageDev] target_format: plist, ext: tmLanguage
----
-name: Dockerfile
-scopeName: source.dockerfile
-uuid: a39d8795-59d2-49af-aa00-fe74ee29576e
-
-patterns:
-# Keywords
-- name: keyword.control.dockerfile
-  match: ^\s*(FROM|MAINTAINER|RUN|CMD|EXPOSE|ENV|ADD)\s
-- name: keyword.operator.dockerfile
-  match: ^\s*(ENTRYPOINT|VOLUME|USER|WORKDIR)\s
-# String
-- name: string.quoted.double.dockerfile
-  begin: "\""
-  end: "\""
-  patterns:
-  - name: constant.character.escaped.dockerfile
-    match: \\.
-# Comment
-- name: comment.block.dockerfile
-  match: ^\s*#.*$
-...