Remove the request-only stuff we don't need anymore

This was introduced in https://github.com/matrix-org/matrix-react-sdk/pull/2250 but can be pulled out due to https://github.com/matrix-org/matrix-js-sdk/pull/770. See https://github.com/vector-im/riot-web/issues/7634 for more information about the future.

webpack.config.js

@@ -106,21 +106,8 @@ module.exports = {
 
             // same goes for js-sdk
             "matrix-js-sdk": path.resolve('./node_modules/matrix-js-sdk'),
-
-            // To make webpack happy
-            // Related: https://github.com/request/request/issues/1529
-            // (there's no mock available for fs, so we fake a mock by using
-            // an in-memory version of fs)
-            "fs": "memfs",
         },
     },
-    node: {
-        // Because webpack is made of fail
-        // https://github.com/request/request/issues/1529
-        // Note: 'mock' is the new 'empty'
-        net: 'mock',
-        tls: 'mock'
-    },
     externals: {
         // Don't try to bundle electron: leave it as a commonjs dependency
         // (the 'commonjs' here means it will output a 'require')