chore(pkg): remove default-valued field "homepage" (#296)

Related to https://github.com/apache/cordova/issues/55
diff --git a/package.json b/package.json
index 29847be..5c8f14c 100644
--- a/package.json
+++ b/package.json
@@ -43,6 +43,5 @@
   "license": "Apache-2.0",
   "devDependencies": {
     "@cordova/eslint-config": "^3.0.0"
-  },
-  "homepage": "https://github.com/apache/cordova-plugin-splashscreen#readme"
+  }
 }