Remove redis-cache volume (#1555)

* Remove redis-cache volume

* remove from docs

* ci: fix pre-commit

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Co-authored-by: Revant Nandgaonkar <revant.one@gmail.com>

overrides/compose.redis.yaml

@@ -9,8 +9,6 @@ services:
 
   redis-cache:
     image: redis:6.2-alpine
-    volumes:
-      - redis-cache-data:/data
 
   redis-queue:
     image: redis:6.2-alpine
@@ -18,5 +16,4 @@ services:
       - redis-queue-data:/data
 
 volumes:
-  redis-cache-data:
   redis-queue-data: