Merge branch 'POC-doc-removal' into 'main'

Deleted chart/docs/POC_DOC.md

See merge request big-bang/apps/sandbox/mimir!43

chart/docs/POC_DOC.md

-# POC Deployment Framework for Mimir Sandbox
-
-## Upstream Big Bang Repo
-
-Upstream Big Bang branch for Grafana Alloy is [epic-414/mimir-sandbox](https://repo1.dso.mil/big-bang/bigbang/-/tree/epic-414/mimir-sandbox?ref_type=heads). 
-
-**IMPORTANT:** The `epic-414/mimir-sandbox` should be treated as the Development branch where no direct commits are made against the branch other than MRs. No direct commit should be taken on the `epic-414/mimir-sandbox`. The process for MR to the branch should:
-
-1. Create a branch.
-2. Make changes to the new branch.
-3. Create a MR with the Observability team as the Reviewers.
-4. Approve and merge branch.
-
-## Test Deployment of Mimir in Local K3d
-The `helm upgrade` step should be deployed from the `epic-414/mimir-sandbox` branch in the Big Bang repo and include the below as overrides:
-
-## Test values.yaml
-<b>Note:</b > Please update the test values.yaml to include testing updated changes as issues get closed that enables those packages.
-
-```yaml
-domain: dev.bigbang.mil
-
-flux:
-  interval: 1m
-  rollback:
-    cleanupOnFail: false
-
-istio:
-  enabled: true
-  values:
-    hardened:
-      enabled: true
-
-addons:
-  mimir:
-    # git:
-    #   tag: null
-    #   branch: "<test-branch>"
-    enabled: true
-    # values:
-    #   istio: # Waiting on istio issues completion before enabling
-    #     enabled: true
-    #     hardened:
-    #       enabled: true
-
-
-kyverno:
-  enabled: true
-
-kyvernoPolicies:
-  enabled: true
-  # restrict-image-registries enforcement is in Audit mode / Remove the below after ironbank images are uploaded
-  values:
-    policies:
-      restrict-image-registries:
-        validationFailureAction: Audit
-```
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