chore: Remove CodSpeed workflow and pytest-codspeed from dependencies (#8299)

.github/workflows/codspeed.yml

@@ -1,48 +0,0 @@
-name: Run benchmarks
-
-on:
-  push:
-    paths:
-      - "src/backend/base/**"
-      - "src/backend/tests/performance/**"
-    branches:
-      - "main" # or "master"
-  pull_request:
-    paths:
-      - "src/backend/base/**"
-      - "src/backend/tests/performance/**"
-      - "!src/backend/base/langflow/components/**"
-  workflow_dispatch:
-
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
-jobs:
-  codspeed:
-    name: Run benchmarks
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        python-version:
-          - "3.12"
-    steps:
-      - name: Check out the code at a specific ref
-        uses: actions/checkout@v4
-      - name: "Setup Environment"
-        uses: ./.github/actions/setup-uv
-        with:
-          python-version: ${{ matrix.python-version }}
-      - name: Run benchmarks
-        uses: CodSpeedHQ/action@v3
-        with:
-            token: ${{ secrets.CODSPEED_TOKEN }}
-            run: |
-              uv run pytest src/backend/tests \
-                --ignore=src/backend/tests/integration \
-                --codspeed \
-                -m "not api_key_required" \
-                -n auto \
-                --timeout 600
-      - name: Minimize uv cache
-        run: uv cache prune --ci