Revert "Setup GitHub actions for V6 branch"

This reverts commit baa908f0b2.

.github/workflows/auto-approve-dominions-prs.yml

@@ -8,7 +8,6 @@ on:
     branches:
     - dev
     - master
-    - V6
 
 concurrency:
   group: "approve-dominion-${{ github.head_ref || github.run_id }}-${{ github.event_name }}"

.github/workflows/ci-pipeline.yml

@@ -25,18 +25,15 @@ on:
     branches:
     - dev
     - master
-    - V6
   pull_request:
     branches:
     - dev
     - master
-    - V6
   pull_request_target:
     types: [ opened, reopened, labeled, synchronize ]
     branches:
     - dev
     - master
-    - V6
 
 env:
   TGS_DOTNET_VERSION: 8

.github/workflows/code-scanning.yml

@@ -5,12 +5,10 @@ on:
     branches:
     - dev
     - master
-    - V6
   pull_request:
     branches:
     - dev
     - master
-    - V6
 
 env:
   TGS_DOTNET_VERSION: 8

.github/workflows/v6-integration.yml

@@ -1,29 +0,0 @@
-name: 'V6 Integration'
-
-on:
-  push:
-    branches:
-    - dev
-
-jobs:
-  v6-integration:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - name: Checkout
-      uses: actions/checkout@v1
-
-    - name: Merge dev into V6
-      uses: robotology/gh-action-nightly-merge@22f5e45d028f22837d617fa07512925457eec184 #v1.3.3
-      with:
-        stable_branch: 'dev'
-        development_branch: 'V6'
-        allow_ff: true
-        allow_forks: true
-        user_name: tgstation-server
-        user_email: tgstation-server@users.noreply.github.com
-        push_token: DEV_PUSH_TOKEN
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        DEV_PUSH_TOKEN: ${{ secrets.DEV_PUSH_TOKEN }}