Android Size reduced related to Asset

I have an android game which has an apk build size of 26MB.

I currently downloaded the post-processing stack from the asset store and imported to my project. And also installed the post-processing from the unity package manager.

After adjusting a few things, I have a build of 38MB.

I decided not to include the post-processing packages. So I uninstalled the post-processing from my package manager and deleted the post-processing folder under my asset folder.

I rebuild, and still have an apk build of 34 MB which is a lot more than 26MB. I am not sure what I am missing here. need help