chore: remove unsupported snap arm64 build step

.github/workflows/desktop.release.yml

@@ -93,13 +93,6 @@ jobs:
           sudo snap install snapcraft --classic
           yarn run webpack --config desktop.webpack.prod.js --env snap
           yarn run electron-builder --linux --x64 -c.linux.target=snap --publish=never
-      - name: SnapArm64
-        run: |
-          yarn run webpack --config desktop.webpack.prod.js --env snap
-          yarn run electron-builder --linux --arm64 -c.linux.target=snap --publish=never
-        env:
-          npm_config_target_arch: 'arm64'
-          SNAPCRAFT_BUILD_ENVIRONMENT: 'host'
 
       - name: Upload
         uses: actions/upload-artifact@v3.0.0