zebra TC75 Android 6 -> Install zebra keyboard how to hide Symbol Tab


I have a lot of zebra device tc75 under android 6 and 7.
I used stage now on last version 3.4 for to install the zebra keyboard.

All works fine on android 7 but i have a problem with some device on android 6
On the xml file we delete the symbol tab but on android 6 that's doesn't work !
The tab still appears ..

Any idea about how to suppress the tab symbol OR hide the emoji icon ?