let stylus decide what is outdated or not

pipeline/compilers/stylus.py

@@ -11,8 +11,6 @@ class StylusCompiler(SubProcessCompiler):
         return filename.endswith('.styl')
 
     def compile_file(self, infile, outfile, outdated=False, force=False):
-        if not outdated and not force:
-            return  # File doesn't need to be recompiled
         command = "%s %s < %s > %s" % (
             settings.PIPELINE_STYLUS_BINARY,
             settings.PIPELINE_STYLUS_ARGUMENTS,