yui: drop obsolete tooling

postcss does everything now and is maintained.

diff --git a/.bin/yuicompressor b/.bin/yuicompressor
deleted file mode 100755 (executable)
index c0c04e0..0000000
--- a/.bin/yuicompressor
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/bin/bash
-exec java -jar "/usr/local/src/extensions/yuicompressor"/yuicompressor-*.jar "$@"