CI: Simplify install_homebrew_deps.bash for modes we don't use (#2753)
CI: Simplify install_homebrew_deps.bash for modes we don't use (#2753)

Now that we use Linux and the ASWF docker containers for the
"clang-format" test, there's no reason to have logic in this setup
script for Mac to choose a more restrictive set of package for that
case.

Same for clang-tidy -- we don't have a test like that anyway, and
if we add one, we will surely do it with one of the Linux containers.

Signed-off-by: Larry Gritz <f0a1ce6f80112d72f7276457fd261d671b827567@larrygritz.com>
OpenImageIO/oiio,OpenImageIO/oiio,OpenImageIO/oiio,lgritz/oiio,lgritz/oiio,OpenImageIO/oiio,lgritz/oiio,lgritz/oiio