no root uninstall system app in android

1) From smartphone enable debug USB (settings -> developer options or something similar);
2) enable MTP mode
3) istall and start adb  (adb start-server).
4) search for exact name of the apps you want to remove (i.g. Facebook is "com.facebook.katana").
5) in (linux) terminal do this command: adb shell pm uninstall  --user 0 [appname]

It works!

As an example I made this bash file

#!/bin/sh
adb start-server
adb shell pm uninstall --user 0 com.facebook.katana
adb shell pm uninstall --user 0 com.facebook.orca
adb shell pm uninstall --user 0 com.asus.ephotoburst
adb shell pm uninstall --user 0 com.asus.task
adb shell pm uninstall --user 0 com.asus.gallery
adb shell pm uninstall --user 0 com.asus.microfilm
adb shell pm uninstall --user 0 com.asus.kidslauncher
adb shell pm uninstall --user 0 com.asus.fmradio
adb shell pm uninstall --user 0 com.asus.taskwidget
adb shell pm uninstall --user 0 com.google.android.apps.photos
adb shell pm uninstall --user 0 com.google.android.gm
adb shell pm uninstall --user 0 com.google.android.videos
adb shell pm uninstall --user 0 com.google.android.music
adb shell pm uninstall --user 0 com.google.android.talk
adb shell pm uninstall --user 0 com.google.android.youtube
adb kill-server