Redirect subfolder to root with nginx

Question

I’ve moved my wordpress site from example.com/mobile to example.com.

For this work, I want:

1. example.com/mobile not redirect. I want it not redirect because I have a category with mobile slug on example.com.
2. example.com/mobile/anycharacter redirect to example.com/anycharacter

This is my nginx rule:

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

This worked with:

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

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

Thank you very much!