Remove v1 general integration tests

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

.github/workflows/test-integration-general.yml

@@ -1,35 +0,0 @@
-name: CI
-
-on: [pull_request]
-
-jobs:
-  integration-test-general:
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v2
-        with:
-          fetch-depth: 2
-
-      - name: Set Swap Space
-        uses: pierotofy/set-swap-space@master
-        with:
-          swap-size-gb: 10
-
-      - name: Get changed files
-        id: changed-files
-        uses: tj-actions/changed-files@v14.1
-        with:
-          files: |
-            *.nix
-            go.*
-            **/*.go
-            integration_test/
-            config-example.yaml
-
-      - uses: cachix/install-nix-action@v16
-        if: steps.changed-files.outputs.any_changed == 'true'
-
-      - name: Run general integration tests
-        if: steps.changed-files.outputs.any_changed == 'true'
-        run: nix develop --command -- make test_integration_general