[Bug 2158787] New: mozc.el: Emacs compiler warnings about undefined functions ‘first’ and ‘third’

https://bugzilla.redhat.com/show_bug.cgi?id=2158787

Bug ID: 2158787
           Summary: mozc.el: Emacs compiler warnings about undefined
                    functions ‘first’ and ‘third’
           Product: Fedora
           Version: 37
          Hardware: x86_64
                OS: Linux
            Status: NEW
         Component: mozc
          Severity: low
          Assignee: [e-mail]
          Reporter: [e-mail]
        QA Contact: [e-mail]
                CC: [e-mail],
                    [e-mail], [e-mail],
                    [e-mail]
  Target Milestone: ---
    Classification: Fedora

Description of problem:
When I start emacs 28.2 on Fedora 37 the first time, I get the following
warning:

Warning (comp): mozc.el:664:22: Warning: the function ‘first’ is not known to
be defined.
Warning (comp): mozc.el:664:9: Warning: the function ‘third’ is not known to be
defined.

Version-Release number of selected component (if applicable):
mozc-2.28.4950.102-1.fc37.x86_64
emacs-28.2-1.fc37.x86_64

How reproducible:
Always.
But note: Warnings are only displayed on the first start of a new emacs
version.

Steps to Reproduce:
1. Install packages mozc-2.28.4950.102-1.fc37.x86_64 emacs-28.2-1.fc37.x86_64
2. Remove emacs cache files in ~/.emacs.d/eln-cache/28.2-*
  rm -rf ~/.emacs.d/eln-cache/28.2-*
3. Start emacs.
4. Check the emacs buffer "*Warnings*".