fix(web): Remove deprecated registerWebPlugin (#288)

Author: jcesarmobile

src/web.ts

@@ -169,11 +169,4 @@ export class CameraPreviewWeb extends WebPlugin implements CameraPreviewPlugin {
       video.style.setProperty('opacity', _options['opacity'].toString());
     }
   }
-}
-
-const CameraPreview = new CameraPreviewWeb();
-
-export { CameraPreview };
-
-import { registerWebPlugin } from '@capacitor/core';
-registerWebPlugin(CameraPreview);
+}