Carlo Cabrera ef7c9cf17c
linux/linkage_checker: remove gcc from undeclared_deps
This is causing warnings all over Homebrew/homebrew-core.

For example, there are dozens of warnings about this in the following CI
run:

    https://github.com/Homebrew/homebrew-core/runs/8116257943?check_suite_focus=true
2022-09-02 14:28:07 +08:00
..
2022-08-05 16:06:22 -07:00
2022-08-10 17:15:37 -04:00