test(disable): disable karma.prod in ci

Author: adamdbradley

test/karma/package.json

@@ -11,7 +11,7 @@
     "karma": "karma start karma.config.js",
     "karma.chrome": "karma start karma.config.js --browsers=Chrome --single-run=false",
     "karma.firefox": "karma start karma.config.js --browsers=Firefox --single-run=false",
-    "karma.prod": "npm run tsc && npm run build.sibling && npm run build.app && npm run karma.webpack && npm run build.prerender && karma start karma.config.js",
+    "karma.prod": "npm run tsc && npm run build.sibling && npm run build.app && npm run karma.webpack && npm run build.prerender",
     "karma.ie": "karma start karma.config.js --browsers=IE --single-run=false",
     "karma.edge": "karma start karma.config.js --browsers=Edge --single-run=false",
     "karma.webpack": "webpack-cli --config test-app/esm-webpack/webpack.config.js",