ci(workflows): remove non-existent make generate step

The lint job referenced `make generate` which has no corresponding
Makefile target, causing CI to fail.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: appleboy

.github/workflows/testing.yml

@@ -32,10 +32,6 @@ jobs:
         with:
           go-version: ${{ matrix.go }}
 
-      - name: Run Generate
-        run: |
-          make generate
-
       - name: Setup golangci-lint
         uses: golangci/golangci-lint-action@v9
         with: