remove unnecessary dep (#908)

Signed-off-by: Tyler Ohlsen <ohltyler@amazon.com>

Author: ohltyler

package.json

@@ -32,8 +32,7 @@
     "jest-canvas-mock": "^2.5.1",
     "lint-staged": "^9.2.0",
     "moment": "^2.24.0",
-    "redux-mock-store": "^1.5.4",
-    "start-server-and-test": "^1.11.7"
+    "redux-mock-store": "^1.5.4"
   },
   "dependencies": {
     "babel-polyfill": "^6.26.0",
@@ -59,4 +58,4 @@
     "braces": "^3.0.3",
     "micromatch": "^4.0.8"
   }
-}
+}