unable to delete raid 0

hi my brother love to try any thing with out read or know so now i have problem with intel rst that i have raid 0 betwen my c drive (ssd) and my hdd
my laptop
ssd : 118 gb
dhh :1 tb
aftert raid 0 i got 244 g new drive
i can not delete raid 0 from software on the win 10
and i cant enter to rst bios by ctrl + i no thing happen when i hit it
if i instal new os win 10 with out delete the raid whats gona happen ? 

 

 

as you see there is no delete option for array 0000

my laptop is acer Predator G9-592