Remove @entry decorator (and misc cleanup)

pre_commit_hooks/util.py

@@ -1,15 +0,0 @@
-import functools
-import sys
-
-
-def entry(func):
-    """Allows a function that has `argv` as an argument to be used as a
-    commandline entry.  This will make the function callable using either
-    explicitly passed argv or defaulting to sys.argv[1:]
-    """
-    @functools.wraps(func)
-    def wrapper(argv=None):
-        if argv is None:
-            argv = sys.argv[1:]
-        return func(argv)
-    return wrapper