How to turn off compiling js files in Assets/Plugins/Android folder in Unity 2018.2.6

I upgraded my project from Unity version 2017.2.1 to 2018.2.6 and now getting compile errors like

Assets/Plugins/Android/mmedia/assets/mmadsdk/mraid.js(115,17):
BCE0044: unexpected char: ‘$’.

But I don’t want to compile it in the editor. How to turn compiling js files off?
Thanks

This issue was corrected on Unity 2018.2.16f1