Remove build:readme script and toctoc dep (#1189)

Followup to f62cfc4 which broke the build:readme script

package.json

@@ -3,7 +3,6 @@
   "version": "1.2.1",
   "description": "A simple React component capable of building HTML forms out of a JSON schema.",
   "scripts": {
-    "build:readme": "toctoc README.md -w",
     "build:lib": "rimraf lib && cross-env NODE_ENV=production babel -d lib/ src/",
     "build:dist": "rimraf dist && cross-env NODE_ENV=production webpack --config webpack.config.dist.js",
     "build:playground": "rimraf build && cross-env NODE_ENV=production webpack --config webpack.config.prod.js && cp playground/index.prod.html build/index.html",
@@ -14,8 +13,8 @@
     "prepare": "npm run dist",
     "precommit": "lint-staged",
     "publish-to-gh-pages": "npm run build:playground && gh-pages --dist build/",
-    "publish-to-npm": "npm run build:readme && npm run dist && npm publish",
-    "preversion": "npm run build:playground && npm run dist && npm run build:readme && npm run cs-check && npm run lint",
+    "publish-to-npm": "npm run dist && npm publish",
+    "preversion": "npm run build:playground && npm run dist && npm run cs-check && npm run lint",
     "start": "node devServer.js",
     "tdd": "cross-env NODE_ENV=test mocha --require babel-register --watch --require ./test/setup-jsdom.js test/**/*_test.js",
     "test": "cross-env NODE_ENV=test mocha --require babel-register --require ./test/setup-jsdom.js test/**/*_test.js",
@@ -96,7 +95,6 @@
     "rimraf": "^2.5.4",
     "sinon": "^1.17.6",
     "style-loader": "^0.13.1",
-    "toctoc": "^0.2.3",
     "webpack": "^4.20.2",
     "webpack-cli": "^3.1.2",
     "webpack-dev-middleware": "^3.4.0",