[Bug] Compiler warning about unknown function doom-modeline-focus-change

### Thank you for the bug report - [x] I am using the latest version of `doom-modeline` related packages. - [x] I checked [FAQ](https://github.com/seagle0128/doom-modeline#faq). - [x] You may also try reproduce the issue using clean environment and minimal configurations with the command `emacs -Q`. ### Bug description When installing and compiling the latest version from MELPA (doom-modeline-20260120.1724), the compiler says: ``` In end of data: doom-modeline.el:294:58: Warning: the function ‘doom-modeline-focus-change’ is not known to be ``` It seems there is a remainder in `doom-modeline.el` after removing the function in `55719da`. ``` $ git grep doom-modeline-focus-change doom-modeline.el: (remove-function after-focus-change-function #'doom-modeline-focus-change) ``` ### Steps to reproduce Byte-compile `doom-modeline.el`. ### Expected behavior No compiler warning. ### OS MacOS ### Emacs Version 31 ### Emacs Configurations _No response_ ### Error callstack ```emacs-lisp ``` ### Anything else _No response_