Revert "[buildbucket] Turn on dscache for BB prod."

This reverts commit e0d147d29a8626c2d1047960273ec6436428023e.

Reason for revert: Need to revert to address fix some previous changes in prod before enabling this.

Original change's description:
> [buildbucket] Turn on dscache for BB prod.
>
> R=​chanli, vadimsh
>
> Change-Id: Icc07924c0d94f9b4738b822eb70fd5d85778cdcb
> Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/4072426
> Reviewed-by: Vadim Shtayura <vadimsh@chromium.org>
> Auto-Submit: Robbie Iannucci <iannucci@chromium.org>
> Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

Change-Id: I17bea2337867d61def0225cccee4472745fa7d08
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/infra/luci/luci-go/+/4072299
Auto-Submit: Robbie Iannucci <iannucci@chromium.org>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
diff --git a/buildbucket/appengine/frontend/service-default-go.yaml b/buildbucket/appengine/frontend/service-default-go.yaml
index ca846ac..43fba86 100644
--- a/buildbucket/appengine/frontend/service-default-go.yaml
+++ b/buildbucket/appengine/frontend/service-default-go.yaml
@@ -13,7 +13,7 @@
     AUTH_SERVICE_HOST: chrome-infra-auth.appspot.com
     REDIS_ADDR: 10.52.56.84:6379
     VPC_CONNECTOR: projects/cr-buildbucket/locations/us-central1/connectors/connector
-    DS_CACHE: redis
+    DS_CACHE: disable
 
 vpc_access_connector:
   name: ${VPC_CONNECTOR}
diff --git a/buildbucket/appengine/monitor/service-monitor.yaml b/buildbucket/appengine/monitor/service-monitor.yaml
index d794e28..effbb85 100644
--- a/buildbucket/appengine/monitor/service-monitor.yaml
+++ b/buildbucket/appengine/monitor/service-monitor.yaml
@@ -13,7 +13,7 @@
     AUTH_SERVICE_HOST: chrome-infra-auth.appspot.com
     REDIS_ADDR: 10.52.56.84:6379
     VPC_CONNECTOR: projects/cr-buildbucket/locations/us-central1/connectors/connector
-    DS_CACHE: redis
+    DS_CACHE: disable
 
 vpc_access_connector:
   name: ${VPC_CONNECTOR}