removing pip version check altogether for python 3.6 compatibility

Makefile

@@ -59,7 +59,6 @@ REQUIREMENTS := test-requirements.txt requirements.txt
 PIP_VERSION ?= 20.3.3
 SETUPTOOLS_VERSION ?= 51.3.3
 PIP_OPTIONS := $(ST2_PIP_OPTIONS)
-PACKAGING_VERSION ?= 23.1
 
 ifndef PYLINT_CONCURRENCY
 	PYLINT_CONCURRENCY := 1
@@ -663,7 +662,6 @@ distclean: clean
 .PHONY: .requirements
 .requirements: virtualenv
 	$(VIRTUALENV_DIR)/bin/pip install --upgrade "pip==$(PIP_VERSION)"
-	$(VIRTUALENV_DIR)/bin/pip install --upgrade "packaging==$(PACKAGING_VERSION)"
 	# Print out pip version
 	$(VIRTUALENV_DIR)/bin/pip --version
 	# Generate all requirements to support current CI pipeline.

scripts/fixate-requirements.py

@@ -34,8 +34,6 @@
 import os.path
 import sys
 
-from packaging.version import Version
-
 # NOTE: This script can't rely on any 3rd party dependency so we need to use this code here
 PY2 = sys.version_info[0] == 2
 PY3 = sys.version_info[0] == 3
@@ -115,15 +113,6 @@ def parse_args():
     return vars(parser.parse_args())
 
 
-def check_pip_version():
-    if Version(pip.__version__) < Version("6.1.0"):
-        print(
-            "Upgrade pip, your version `{0}' " "is outdated:\n".format(pip.__version__),
-            GET_PIP,
-        )
-        sys.exit(1)
-
-
 def load_requirements(file_path):
     return tuple((r for r in parse_requirements(file_path, session=False)))