Bump hacking

hacking 4.0.x is very old.

Change-Id: I39976bf2842773453bbf5904791df8c10f7e920c

.pre-commit-config.yaml

@@ -32,7 +32,7 @@ repos:
       - id: flake8
         name: flake8
         additional_dependencies:
-          - hacking>=4.0.0,<4.1.0
+          - hacking>=6.1.0,<6.2.0
         language: python
         entry: flake8
         files: '^.*\.py$'

test-requirements.txt

@@ -1,7 +1,3 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-
 # Used for making sure the eventlet executors work.
 eventlet!=0.18.3,!=0.20.1,>=0.18.2 # MIT