1. Enable USB debugging

Press Miui model seven times and go to developer options to enable usb debugging.

Disable find my phone to prevent device administrator


2. To uninstall googlequicksearchbox

pm uninstall -k --user 0 com.google.android.googlequicksearchbox

3. To list things

pm list packages | grep xiaomi


4. Details

Xiaomi
pm uninstall -k --user 0 com.xiaomi.scanner
pm uninstall -k --user 0 com.xiaomi.payment
pm uninstall -k --user 0 com.mi.global.bbs
pm uninstall -k --user 0 com.miui.enbbs
pm uninstall -k --user 0 com.miui.bugreport

miui
pm uninstall -k --user 0 com.miui.yellowpage
pm uninstall -k --user 0 com.miui.analytics
pm uninstall -k --user 0 com.miui.weather2
pm uninstall -k --user 0 com.miui.fm
pm uninstall -k --user 0 com.miui.videoplayer
pm uninstall -k --user 0 com.miui.player

android
pm uninstall -k --user 0  com.google.android.googlequicksearchbox
pm uninstall -k --user 0 com.android.chrome
pm uninstall -k --user 0 com.google.android.gm
pm uninstall -k --user 0 com.google.android.music
pm uninstall -k --user 0 com.google.android.videos
pm uninstall -k --user 0 com.android.browser
pm uninstall -k --user 0 com.google.android.apps.tachyon
pm uninstall -k --user 0 com.google.android.apps.photos


DO NOT REMOVE
com.google.android.gms

Note
When Google Mobile Services is removed, everything will break. Including Play store.