Remove broken discord upload

[no changelog]

.github/workflows/build.yml

@@ -34,11 +34,3 @@ jobs:
                   newfilename=build/libs/Firmament-$(git rev-parse --short HEAD).jar
                   echo filename=$newfilename >>"$GITHUB_OUTPUT"
                   mv build/libs/Firmament-*.jar $newfilename
-            - name: Upload artifact to discord
-              if: ${{ github.ref == 'refs/heads/master' }}
-              uses: tsickert/discord-webhook@v5.3.0
-              with:
-                  webhook-url: ${{ secrets.WEBHOOK_URL }}
-                  filename: ${{ steps.artifact-rename.outputs.filename }}
-
-