Fix errant file added in cabal extra-files

Author: telser

servant-swagger-ui/servant-swagger-ui.cabal

@@ -30,7 +30,6 @@ extra-source-files:
   swagger-ui-dist-4.14.0/favicon-16x16.png
   swagger-ui-dist-4.14.0/favicon-32x32.png
   swagger-ui-dist-4.14.0/oauth2-redirect.html
-  swagger-ui-dist-4.14.0/swagger-initializer.js
   swagger-ui-dist-4.14.0/swagger-ui-bundle.js
   swagger-ui-dist-4.14.0/swagger-ui-bundle.js.map
   swagger-ui-dist-4.14.0/swagger-ui-es-bundle-core.js