fix: remove unneeded proxy (GoogleCloudPlatform#4039)

Co-authored-by: Jennifer Davis <sigje@google.com>

Author: 2 people

run/idp-sql/package.json

@@ -15,7 +15,7 @@
   "scripts": {
     "start": "node index.js",
     "unit-test": "c8 mocha -p -j 2 test/app.test.js --timeout=120000 --exit",
-    "system-test": "test/proxy-setup.sh && c8 mocha -p -j 2 test/system.test.js --timeout=1800000 --exit",
+    "system-test": "c8 mocha -p -j 2 test/system.test.js --timeout=1800000 --exit",
     "all-test": "npm run unit-test && npm run system-test",
     "test": "npm -- run all-test"
   },