diff --git a/config/env.js b/config/env.js
index 30a6c7f..b681185 100644
--- a/config/env.js
+++ b/config/env.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const fs = require('fs');
 const path = require('path');
 const paths = require('./paths');
diff --git a/config/jest/cssTransform.js b/config/jest/cssTransform.js
index 8f65114..d361235 100644
--- a/config/jest/cssTransform.js
+++ b/config/jest/cssTransform.js
@@ -1,5 +1,3 @@
-'use strict';
-
 // This is a custom Jest transformer turning style imports into empty objects.
 // http://facebook.github.io/jest/docs/en/webpack.html
 
diff --git a/config/jest/fileTransform.js b/config/jest/fileTransform.js
index 9e4047d..7c0150f 100644
--- a/config/jest/fileTransform.js
+++ b/config/jest/fileTransform.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const path = require('path');
 
 // This is a custom Jest transformer turning file imports into filenames.
diff --git a/config/paths.js b/config/paths.js
index 6d16efc..29af90b 100644
--- a/config/paths.js
+++ b/config/paths.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const path = require('path');
 const fs = require('fs');
 const url = require('url');
diff --git a/config/polyfills.js b/config/polyfills.js
index 66dff0a..9c61b85 100644
--- a/config/polyfills.js
+++ b/config/polyfills.js
@@ -1,5 +1,3 @@
-'use strict';
-
 if (typeof Promise === 'undefined') {
   // Rejection tracking prevents a common issue where React gets into an
   // inconsistent state due to an error, but it gets swallowed by a Promise,
diff --git a/config/webpack.config.prod.js b/config/webpack.config.prod.js
index 1ae34ea..9d58f3b 100644
--- a/config/webpack.config.prod.js
+++ b/config/webpack.config.prod.js
@@ -1,5 +1,3 @@
-'use strict';
-
 //const autoprefixer = require('autoprefixer');
 const path = require('path');
 const webpack = require('webpack');
@@ -15,9 +13,7 @@ const getClientEnvironment = require('./env');
 // Webpack uses `publicPath` to determine where the app is being served from.
 // It requires a trailing slash, or the file assets will get an incorrect path.
 const publicPath = paths.servedPath;
-// Some apps do not use client-side routing with pushState.
-// For these, "homepage" can be set to "." to enable relative asset paths.
-const shouldUseRelativeAssetPaths = publicPath === './';
+
 // Source maps are resource heavy and can cause out of memory issue for large source files.
 const shouldUseSourceMap = process.env.GENERATE_SOURCEMAP !== 'false';
 // `publicUrl` is just like `publicPath`, but we will provide it to our app
diff --git a/config/webpackDevServer.config.js b/config/webpackDevServer.config.js
index 6cfa8cf..f501fda 100644
--- a/config/webpackDevServer.config.js
+++ b/config/webpackDevServer.config.js
@@ -1,5 +1,3 @@
-'use strict';
-
 const errorOverlayMiddleware = require('react-dev-utils/errorOverlayMiddleware');
 const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
 const ignoredFiles = require('react-dev-utils/ignoredFiles');
diff --git a/scripts/build.js b/scripts/build.js
index 5709f48..a43824f 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -1,5 +1,3 @@
-'use strict';
-
 // Do this as the first thing so that any code reading it knows the right env.
 process.env.BABEL_ENV = 'production';
 process.env.NODE_ENV = 'production';
diff --git a/scripts/start.js b/scripts/start.js
index 39d105b..7dd6707 100644
--- a/scripts/start.js
+++ b/scripts/start.js
@@ -1,5 +1,3 @@
-'use strict';
-
 // Do this as the first thing so that any code reading it knows the right env.
 process.env.BABEL_ENV = 'development';
 process.env.NODE_ENV = 'development';
diff --git a/scripts/test.js b/scripts/test.js
index 45a643a..d0991e2 100644
--- a/scripts/test.js
+++ b/scripts/test.js
@@ -1,5 +1,3 @@
-'use strict';
-
 // Do this as the first thing so that any code reading it knows the right env.
 process.env.BABEL_ENV = 'test';
 process.env.NODE_ENV = 'test';