How can i remove this message from battery option showing only percentage

Hi there shayan157,

If you are seeing a certain message about the your battery health under Settings > Battery on your iPhone, this information from iPhone Battery and Performance (that you've already looked over) explains what each message indicates:

Battery health unknown

If iOS is unable to determine the device battery health, you'll see this message:

This iPhone is unable to determine battery health. An Apple Authorized Service Provider can service the battery. More about service options…

This may be due to having an improperly installed battery or an unknown battery part.

Battery health degraded

If battery health has degraded significantly, the below message will also appear:

Your battery’s health is significantly degraded. An Apple Authorized Service Provider can replace the battery to restore full performance and capacity. More about service options…

This message does not indicate a safety issue. Your battery can still be used. However, you may be experiencing more noticeable battery and performance issues. A new replacement battery will improve your experience. More about service options.

If you are seeing a message about an unknown part or about a genuine battery, this article has more details on why this may occur: About genuine iPhone batteries

If something else is happening, please provide more specifics so that we can continue to assist.

Cheers!