STRWEB-90 omit css alias cruft (#126)

Don't manipulate `config.resolve.extensions` for the benefit of CSS
because it appears we're not actually leveraging it anywhere. Additional
spot-testing across a variety of applications doesn't show any of the
odd problems we saw when we first tried to clean this up in STRWEB-85.

Refs STRWEB-90

CHANGELOG.md

@@ -25,6 +25,7 @@
 * Remove SVGO-dependencies. Replaced by SVGR for loading STCOM SVG's as react-components. Refs STRWEB-77.
 * Bump `@svgr/webpack` from `7.0.0` to `8.1.0`.
 * Bump `babel-loader` from `^8.0.0` to `^9.1.3`.
+* Omit CSS alias cruft, leaving `config.resolve.extenssions` alone. Refs STRWEB-90, STRWEB-85.
 
 ## [4.2.0](https://github.com/folio-org/stripes-webpack/tree/v4.2.0) (2023-01-30)
 [Full Changelog](https://github.com/folio-org/stripes-webpack/compare/v4.1.2...v4.2.0)

webpack.config.cli.shared.styles.js

@@ -12,8 +12,6 @@ module.exports = (config, context) => {
       "stcom-interactionStyles": getSharedStyles("lib/sharedStyles/interactionStyles"),
       "stcom-variables": getSharedStyles("lib/variables"),
     };
-
-    config.resolve.extensions.push('css');
   }
 
   return config;