removes dependencies that cause problems for yarn install --flat

Author: zevdg

packages/firestore/package.json

@@ -25,7 +25,6 @@
     "@firebase/firestore-types": "0.2.2",
     "@firebase/logger": "0.1.0",
     "@firebase/webchannel-wrapper": "0.2.6",
-    "grpc": "^1.9.1",
     "tslib": "^1.9.0"
   },
   "peerDependencies": {
@@ -72,5 +71,8 @@
       ".ts"
     ],
     "reportDir": "./coverage/node"
+  },
+  "optionalDependencies": {
+    "grpc": "^1.9.1"
   }
 }

packages/messaging/package.json

@@ -18,7 +18,6 @@
   "dependencies": {
     "@firebase/messaging-types": "0.1.2",
     "@firebase/util": "0.1.10",
-    "lcov-result-merger": "^2.0.0",
     "tslib": "^1.9.0"
   },
   "devDependencies": {