Redirect subfolder to root with nginx

Hello, I’ve moved my wordpress site from domain.com/mobile to domain.com. For this work, I want:

• domain.com/mobile not redirect. I want it not redirect because I have a category with mobile slug on domain.com.
• domain.com/mobile/anycharacter redirect to domain.com/anycharacter

This is my nginx rule:

location ~ ^/mobile/ {
   rewrite ^/mobile/(.*?)$ https://domain.com/$1 permanent;
}

This worked with:

• domain.com/mobile redirect domain.com
• domain.com/mobile/anycharacter redirect to domain.com/anycharacter

Anyone have suggest to help me solve this problem (not redirect domain.com/mobile to domain.com)?

Thank you very much!