Remove old cordova-plugin-compat quirk from doc (#185)

obsolete now that cordova-plugin-compat was removed in PR #182

(bug #151)
diff --git a/createmobilespec/README.md b/createmobilespec/README.md
index 29a1ecb..a85e2dd 100644
--- a/createmobilespec/README.md
+++ b/createmobilespec/README.md
@@ -97,4 +97,3 @@
 Some known quirks and issues:
 
 * [`npm install` inside `cordova-js` is needed to resolve a local grunt issue](https://github.com/apache/cordova-mobile-spec/issues/150)
-* [It may be required to uninstall the `cordova-plugin-compat` plugin due to multiple "BuildHelper" classes defined in dex files](https://github.com/apache/cordova-mobile-spec/issues/151)(<https://stackoverflow.com/questions/46562289/multiple-dex-files-define-lorg-apache-cordova-buildhelper/46562523#46562523>)