fix(charts): remove malfunctioning SCALE migration script

charts/stable/joplin-server/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "2.7.4"
 description: This server allows you to sync any Joplin client
 name: joplin-server
-version: 7.0.0
+version: 7.0.1
 kubeVersion: '>=1.16.0-0'
 keywords:
   - joplin

charts/stable/joplin-server/SCALE/migrations/migrate

@@ -1,21 +0,0 @@
-#!/usr/bin/python3
-import json
-import os
-import sys
-
-
-def migrate(values):
-    values.update({
-        **({'secretEnv': values['secret']} if values.get('secret') else {}),
-        **({'secret': {}} if values.get('secret'))
-    })
-    return values
-
-
-if __name__ == '__main__':
-    if len(sys.argv) != 2:
-        exit(1)
-
-    if os.path.exists(sys.argv[1]):
-        with open(sys.argv[1], 'r') as f:
-            print(json.dumps(migrate(json.loads(f.read()))))