Remove unused css, remove moment.js localization files except EN

CHANGELOG.md

@@ -6,6 +6,7 @@
 - [#2294](https://github.com/poanetwork/blockscout/pull/2294) - add healthy block period checking endpoint
 
 ### Fixes
+- [#2378](https://github.com/poanetwork/blockscout/pull/2378) - Page performance: exclude moment.js localization files except EN, remove unused css
 - [#2375](https://github.com/poanetwork/blockscout/pull/2375) - Update created_contract_code_indexed_at on transaction import conflict
 - [#2346](https://github.com/poanetwork/blockscout/pull/2346) - Avoid fetching internal transactions of blocks that still need refetching
 - [#2350](https://github.com/poanetwork/blockscout/pull/2350) - fix invalid User agent headers

apps/block_scout_web/assets/css/components/_footer.scss

@@ -61,10 +61,6 @@ $footer-logo-width: auto !default;
   }
 }
 
-.footer-info {
-  padding-top: 1em;
-}
-
 .footer-link {
   color: $footer-link-color;
 

apps/block_scout_web/assets/css/components/_network-selector.scss

@@ -287,16 +287,6 @@ $network-selector-item-icon-dimensions: 30px !default;
   }
 }
 
-.network-selector-load-more-container {
-  flex-shrink: 1;
-  padding: 0 $network-selector-horizontal-padding;
-
-  .btn-network-selector-load-more {
-    @include btn-line($btn-network-selector-load-more-background, $btn-network-selector-load-more-color);
-    width: 100%;
-  }
-}
-
 .network-selector-item-favorite {
   align-items: center;
   cursor: pointer;

apps/block_scout_web/assets/webpack.config.js

@@ -1,6 +1,7 @@
 const path = require('path');
 const ExtractTextPlugin = require('extract-text-webpack-plugin');
 const CopyWebpackPlugin = require('copy-webpack-plugin');
+const { ContextReplacementPlugin } = require('webpack')
 const glob = require("glob");
 
 function transpileViewScript(file) {
@@ -74,7 +75,8 @@ const appJs =
     },
     plugins: [
       new ExtractTextPlugin('../css/app.css'),
-      new CopyWebpackPlugin([{ from: 'static/', to: '../' }])
+      new CopyWebpackPlugin([{ from: 'static/', to: '../' }]),
+      new ContextReplacementPlugin(/moment[\/\\]locale$/, /en/)
     ]
   }