Drop SBOM Generation in Presubmit

Signed-off-by: Adolfo García Veytia (Puerco) <puerco@chainguard.dev>

.github/workflows/build-pr.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go: [ "^1.17", "^1.18" ]
+        go: [ "^1.20" ]
     steps:
       - name: Checkout Repository
         uses: actions/checkout@v3
@@ -26,21 +26,3 @@ jobs:
         run: make check-headers
       - name: Build
         run: make build
-  generate:
-    name: Generate sbom file
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout the repository
-        uses: actions/checkout@v2
-      - name: gh-action-spdx-sbom-generator
-        uses: niravpatel27/gh-action-spdx-sbom-generator@v1.0.0
-        with:
-          version: '0.0.3'
-      - name: Check if sbom file generated
-        run: |
-          if [ ! -f "bom-go-mod.spdx" ]; then
-            echo "::error::bom-go-mod.spdx is missing. Must generate using the spdx-sbom-generator cli."
-            exit 1
-          else
-             echo "Success!"
-          fi