Remove x86 bins from Android build

Opening the apk of one of my 2D games with Winrar I noticed that the lib folder contains two subfolders:
armeabi-v7a
and x86.
They both contain three .so files.

One of the biggest problems I found on the google play store is that 2D games, that are expected to be small and light, if made with Unity have a footprint of about 18MB (!) only made by the Unity engine, that is in my opinion responsible for a very big loss of downloads.
As a matter of fact, all or almost all those 18MB are those two lib directories, and just removing one of them, specifically x86, would decrease that footprint by about 50%.

Would it be possible to do it some how?

Are you suggesting that having a build size of 18MB is responsible for low downloads? On modern broadband that will download in about 4.5 seconds.

It seems some devices have Intel chips. Thats what the x86 folder is for I guess.

Anyway, look in Build Setting → Player Settings → Other Settings → Device Filter. Change it from FAT to Armv7.