remove extra deps

Author: mathieudutour

package.json

@@ -29,7 +29,6 @@
   },
   "homepage": "https://github.com/mathieudutour/git-sketch-plugin#readme",
   "devDependencies": {
-    "babel-core": "^6.18.2",
     "babel-plugin-transform-react-jsx": "^6.8.0",
     "babel-preset-es2015": "^6.18.0",
     "babel-preset-react": "^6.16.0",
@@ -40,7 +39,7 @@
     "eslint-plugin-node": "4.2.2",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
-    "skpm": "^0.8.0"
+    "skpm": "^0.8.1"
   },
   "dependencies": {
     "eslint-config-sketch": "^0.2.2",