Remove runner threads and RAM test

We don't need to test runner functionality now since the runner is only
used in PR checks, and `extractor-ram-threads.yml` covers the Action
case.

.github/workflows/runner-checks.yml

@@ -1,53 +0,0 @@
-name: CodeQL Runner Checks
-
-on:
-  push:
-    branches: [main, releases/v1, releases/v2]
-  pull_request:
-    # Run checks on reopened draft PRs to support triggering PR checks on draft PRs that were opened
-    # by other workflows.
-    types: [opened, synchronize, reopened, ready_for_review]
-  workflow_dispatch:
-
-jobs:
-  runner-extractor-ram-threads-options:
-    name: Runner ubuntu extractor RAM and threads options
-
-    runs-on: ubuntu-latest
-    timeout-minutes: 45
-
-    steps:
-      - uses: actions/checkout@v3
-
-      - name: Build runner
-        run: |
-          cd runner
-          npm install
-          npm run build-runner
-
-      - name: Run init
-        run: |
-          runner/dist/codeql-runner-linux init --ram=230 --threads=1 --repository $GITHUB_REPOSITORY --languages java --github-url $GITHUB_SERVER_URL --github-auth ${{ github.token }}
-        env:
-          TEST_MODE: true
-
-      - name: Assert Results
-        shell: bash
-        run: |
-          . ./codeql-runner/codeql-env.sh
-          if [ "${CODEQL_RAM}" != "230" ]; then
-            echo "CODEQL_RAM is '${CODEQL_RAM}' instead of 230"
-            exit 1
-          fi
-          if [ "${CODEQL_EXTRACTOR_JAVA_RAM}" != "230" ]; then
-            echo "CODEQL_EXTRACTOR_JAVA_RAM is '${CODEQL_EXTRACTOR_JAVA_RAM}' instead of 230"
-            exit 1
-          fi
-          if [ "${CODEQL_THREADS}" != "1" ]; then
-            echo "CODEQL_THREADS is '${CODEQL_THREADS}' instead of 1"
-            exit 1
-          fi
-          if [ "${CODEQL_EXTRACTOR_JAVA_THREADS}" != "1" ]; then
-            echo "CODEQL_EXTRACTOR_JAVA_THREADS is '${CODEQL_EXTRACTOR_JAVA_THREADS}' instead of 1"
-            exit 1
-          fi