Reduce build time by removing linters from the core build step

Run linters separately:

- in text editors - see kpi.code-workspace, #4230
- as a cli step - see package.json "scripts"

package.json

@@ -146,6 +146,8 @@
     "test": "webpack --config webpack/test.config.js && mocha-chrome test/tests.html",
     "test-autobuild": "echo \"hint: open file://$(pwd)/test/tests.html, refresh manually\n\n\" && webpack --config webpack/test.autobuild.js",
     "lint": "eslint \"jsapp/js/**/*\" --ext .es6,.js,.jsx,.ts,.tsx",
+    "lint-coffee": "coffeelint -f ./coffeelint.json jsapp/xlform/src test",
+    "lint-styles": "stylelint jsapp/**/*.{css,scss} --ip jsapp/compiled --ip jsapp/fonts",
     "show-icons": "opn jsapp/fonts/k-icons.html",
     "generate-icons": "node ./scripts/generate_icons.js",
     "copy-fonts": "python ./scripts/copy_fonts.py && npm run generate-icons",

webpack/webpack.common.js

@@ -1,6 +1,5 @@
 const BundleTracker = require('webpack-bundle-tracker');
 const ExtractTranslationKeysPlugin = require('webpack-extract-translation-keys-plugin');
-const ESLintPlugin = require('eslint-webpack-plugin');
 const fs = require('fs');
 const lodash = require('lodash');
 const path = require('path');
@@ -34,26 +33,6 @@ const babelLoader = {
 const commonOptions = {
   module: {
     rules: [
-      {
-        enforce: 'pre',
-        test: /\.coffee$/,
-        exclude: /node_modules/,
-        loader: 'less-terrible-coffeelint-loader',
-        options: {
-          failOnErrors: true,
-          failOnWarns: false,
-          // custom reporter function that only returns errors (no warnings)
-          reporter: function (errors) {
-            errors.forEach((error) => {
-              if (error.level === 'error') {
-                this.emitError(
-                  [error.lineNumber, error.message].join(' ') + '\n'
-                );
-              }
-            });
-          },
-        },
-      },
       {
         test: /\.(js|jsx|es6)$/,
         exclude: /node_modules/,
@@ -128,10 +107,6 @@ const commonOptions = {
       output: path.join(outputPath, 'extracted-strings.json'),
     }),
     new webpack.ProvidePlugin({$: 'jquery'}),
-    new ESLintPlugin({
-      quiet: true,
-      extensions: ['js', 'jsx', 'ts', 'tsx', 'es6'],
-    }),
   ],
 };