docs(readme): remove known issue warning

see #139 #132

README.md

@@ -75,10 +75,6 @@ yarn electron package:preview
 
 The packaged application is located in `applications/electron/dist`.
 
-**Known Issue** 
-It is possible that during the `package:preview` step users encounter an error, see [#132](https://github.com/eclipse-theia/theia-blueprint/issues/132). 
-This error should not impede the bundling native to your OS, which can be used to testing etc.
-
 ### Running E2E Tests
 
 The E2E tests basic UI tests of the actual application.