Remove unused dependencies from core package

packages/mdx-deck/cli.js

@@ -4,10 +4,6 @@ const meow = require('meow')
 const findup = require('find-up')
 const open = require('react-dev-utils/openBrowser')
 const chalk = require('chalk')
-const remark = {
-  emoji: require('remark-emoji'),
-  unwrapImages: require('remark-unwrap-images'),
-}
 const pkg = require('./package.json')
 
 const config = require('pkg-conf').sync('mdx-deck')

packages/mdx-deck/package.json

@@ -41,11 +41,8 @@
     "emotion-theming": "^10.0.7",
     "find-up": "^3.0.0",
     "friendly-errors-webpack-plugin": "^1.7.0",
-    "hhmmss": "^1.0.0",
-    "loader-utils": "^1.2.3",
     "meow": "^5.0.0",
     "pkg-conf": "^2.1.0",
-    "querystring": "^0.2.0",
     "react": "^16.8.3",
     "react-dev-utils": "^7.0.3",
     "react-dom": "^16.8.3",
@@ -54,7 +51,6 @@
     "rimraf": "^2.6.3",
     "serve-static": "^1.13.2",
     "style-loader": "^0.23.1",
-    "styled-loader": "^0.0.0",
     "webpack": "^4.29.6",
     "webpack-dev-middleware": "^3.6.0",
     "webpack-hot-client": "^4.1.1",
@@ -63,12 +59,9 @@
     "webpackbar": "^3.1.5"
   },
   "devDependencies": {
-    "@rebass/grid": "^6.0.0-7",
     "husky": "^1.3.1",
     "lint-staged": "^8.1.5",
-    "mdx-deck-code-surfer": "^0.5.5",
-    "prettier": "^1.16.4",
-    "react-test-renderer": "^16.8.3"
+    "prettier": "^1.16.4"
   },
   "husky": {
     "hooks": {