Buck: Cleanup dependencies in CM integration code

Since [1] Buck implicitly adds :foo and :bar in $(exe :foo) and
$(location :bar) macros to the dependency list of genrule(). The
code base was adjusted to reflect this enhancement in Ie3a9de0b2.
In I996b8d2a1 the unneeded dependencies were partially re-added
in CM integration code.

Re-remove it again.

[1] https://github.com/facebook/buck/issues/128
Change-Id: I8d0aaa5c9f7586f04f169f8362709b1fc7b04dcc

lib/codemirror/closure.defs

@@ -3,8 +3,7 @@ def js_minify(
     out,
     compiler_args = [],
     srcs = [],
-    generated = [],
-    deps = []):
+    generated = []):
   cmd = ['$(exe :js_minifier) --js_output_file $OUT'] + compiler_args
   if srcs:
     cmd.append('$SRCS')
@@ -15,6 +14,5 @@ def js_minify(
     name = name,
     cmd = ' '.join(cmd),
     srcs = srcs,
-    deps = deps + generated + [':js_minifier'],
     out = out,
   )