Remove bad test

Related issue:
- https://github.com/uBlockOrigin/uBlock-issues/issues/1798

src/js/asset-viewer.js

@@ -35,9 +35,6 @@ import './codemirror/ubo-static-filtering.js';
     const assetKey = subscribeParams.get('url');
     if ( assetKey === null ) { return; }
 
-    // https://github.com/uBlockOrigin/uBlock-issues/issues/1797
-    if ( /^(file|https?):\/\//.test(assetKey) === false ) { return; }
-
     const subscribeElem = subscribeParams.get('subscribe') !== null
         ? document.getElementById('subscribe')
         : null;