Package Project to IOS Platform , but a empty project have 90+m, it is so big

I am a new worker for ue4, want use it to phone, so, i package a empty project to ios platform, but it have 96M, the 90M that have no other resources is so big, i cant believe.

i want to solve the issue, but i have no good way.

i hope somebody can help me.

i read the editoropenOrder.log file, it package some files,like common uasset, shader, bp_sky, font and so on, it look like so much…