remove upgrade_strategy for now

test/wg-easy/upgrade_strategy

@@ -1,37 +0,0 @@
-#!/usr/bin/python3
-import json
-import sys
-import re
-
-from catalog_update.upgrade_strategy import datetime_versioning
-
-
-# Upstream uses only a single digit for tags
-VERSION_REG = r'[0-9]*'
-
-
-def newer_mapping(image_tags):
-    key = list(image_tags.keys())[0]
-    tags = []
-    for tag in image_tags[key]:
-        match = re.fullmatch(VERSION_REG, tag)
-        if match:
-            tags.append(tag.split('-')[0])
-
-    version = datetime_versioning(list(tags), '%y%m%d')
-    if not version:
-        return {}
-
-    return {
-        'tags': {key: f'{version}-bullseye'},
-        'app_version': version,
-    }
-
-
-if __name__ == '__main__':
-    try:
-        versions_json = json.loads(sys.stdin.read())
-    except ValueError:
-        raise ValueError('Invalid json specified')
-
-    print(json.dumps(newer_mapping(versions_json)))