When you installed the Brave Browser repo, you probably ran the following command:
dnf config-manager --add-repo=
When `dnf` created the repo, the “name” in the repo definition is the string you are seeing. What you see every time you run `dnf` commands is it pulling the repository metadata. It prints out the name of each repo as it gathers repo metadata. Despite the fact that you removed the browser package, the dnf repository is still installed on your system.
If you want it to not use the brave browser repo anymore, either delete the repo file or disable it by setting “enabled=0” in the repo file.