Removed deprecated flow webpack plugin

package.json

@@ -40,7 +40,6 @@
         "ethereumjs-units": "^0.2.0",
         "ethereumjs-util": "^5.2.0",
         "express": "^4.16.3",
-        "flow-webpack-plugin": "^1.2.0",
         "friendly-errors-webpack-plugin": "^1.7.0",
         "git-revision-webpack-plugin": "^3.0.3",
         "hdkey": "^0.8.0",

webpack/dev.babel.js

@@ -2,7 +2,6 @@ import webpack from 'webpack';
 import GitRevisionPlugin from 'git-revision-webpack-plugin';
 import HtmlWebpackPlugin from 'html-webpack-plugin';
 import FriendlyErrorsWebpackPlugin from 'friendly-errors-webpack-plugin';
-import FlowWebpackPlugin from 'flow-webpack-plugin';
 import WebpackBuildNotifierPlugin from 'webpack-build-notifier';
 
 // turn on for bundle analyzing
@@ -106,9 +105,6 @@ module.exports = {
         new webpack.DefinePlugin({
             COMMITHASH: JSON.stringify(gitRevisionPlugin.commithash()),
         }),
-        new FlowWebpackPlugin({
-            reportingSeverity: 'warning',
-        }),
         new HtmlWebpackPlugin({
             chunks: ['index'],
             template: `${SRC}index.html`,

webpack/production.babel.js

@@ -1,4 +1,3 @@
-
 import webpack from 'webpack';
 import GitRevisionPlugin from 'git-revision-webpack-plugin';
 import HtmlWebpackPlugin from 'html-webpack-plugin';
@@ -6,7 +5,6 @@ import FriendlyErrorsWebpackPlugin from 'friendly-errors-webpack-plugin';
 import CopyWebpackPlugin from 'copy-webpack-plugin';
 import { SRC, BUILD, PUBLIC } from './constants';
 
-
 const gitRevisionPlugin = new GitRevisionPlugin();
 
 module.exports = {

yarn.lock

@@ -4736,10 +4736,6 @@ flow-bin@0.75.0:
   version "0.75.0"
   resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.75.0.tgz#b96d1ee99d3b446a3226be66b4013224ce9df260"
 
-flow-webpack-plugin@^1.2.0:
-  version "1.2.0"
-  resolved "https://registry.yarnpkg.com/flow-webpack-plugin/-/flow-webpack-plugin-1.2.0.tgz#1958821d16135028e391cad5ee2f3a4fa78197ec"
-
 flush-write-stream@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/flush-write-stream/-/flush-write-stream-1.0.2.tgz#c81b90d8746766f1a609a46809946c45dd8ae417"