I see, alright. I should do this in systemd or in terminal after booting OS ?
In terminal after booting
I am trying to find exact command for deleting. Not lucky so far 
You can use the file manager to delete them graphically.
i do not have access to that folder.
Which file manager are you using?
If it’s dolphin, go to View → Act as Administrator
xfce default one - thunar
i can download dolphin and do it there
It isn’t THAT hard to do rm -r {directory} guys
in Thunar you may have to set it up to allow you to use root you can do this simply buy choosing Edit/Custom Actions
Create a new action
In the tab you can add
thunar admin:%d
to the command line and save it (note title the other’s as you like)
restart thunar and then try to access with root permission.
True. But that would also delete the directory itself which is not what we want.
Ohhh. Then rm {file}
sudo rm -rf /path/to/dir/*
To delete all files in dir.
To also delete dir:
sudo rm -rf /path/to/dir
cheers, i done it through Tunar root privilege, downloading kernels now
Ok. Dalto i kindly wanna thank you 
My system is repaired. Also thanks to all others that helped me. Cleaning of Efi folder helped. Your kind aproach guys have made me donator from today.
To conclude this topic. Why this efi error happen in first place ? Are there any steps i can do to prevent this error in future ?
No problemo ! After is just a question of tweawks !
Cheers.
F.
It is hard to say after the fact but from the symptoms you are seeing, it is most likely that an update failed in the middle.
Whenever you update your system, keep an eye on the update and ensure it completes successfully before rebooting.
Another possibility some kind of installation issue, like maybe you had already some partitions on disk.
But if after install your system booted fine, its not the case.
Yeah it booted completely fine several times after install.