refactor: remove process.env references in ParagonWebpackPlugin, no s…

…upported

lib/plugins/paragon-webpack-plugin/ParagonWebpackPlugin.js

@@ -11,12 +11,6 @@ const {
   injectParagonCoreStylesheets,
   injectParagonThemeVariantStylesheets,
 } = require('./utils');
-const resolvePrivateEnvConfig = require('../../resolvePrivateEnvConfig');
-
-// Allow private/local overrides of env vars from .env.development for config settings
-// that you'd like to persist locally during development, without the risk of checking
-// in temporary modifications to .env.development.
-resolvePrivateEnvConfig('.env.private');
 
 // Resolve configuration `env.config`.
 const envConfigFile = path.resolve(process.cwd(), 'env.config.js');
@@ -47,10 +41,7 @@ class ParagonWebpackPlugin {
   }
 
   /**
-   * Resolves the MFE configuration for ``PARAGON_THEME_URLS`` in the following priority order:
-   *
-   * 1. ``envConfig.PARAGON_THEME_URLS``
-   * 2. ``process.env.PARAGON_THEME_URLS``
+   * Resolves the MFE configuration for ``PARAGON_THEME_URLS`` in env.config.js
    *
    * @returns {Object} Metadata about the Paragon and brand theme URLs from configuration.
    */
@@ -64,7 +55,7 @@ class ParagonWebpackPlugin {
       }
     }
 
-    const paragonThemeUrls = envConfig?.PARAGON_THEME_URLS ?? process.env.PARAGON_THEME_URLS;
+    const paragonThemeUrls = envConfig?.PARAGON_THEME_URLS ?? {};
 
     this.paragonThemeUrlsConfig = paragonThemeUrls;
   }