gtk4 is now getting sucked into installer images because mutter
depends on it (since 44-beta). Strip some stuff the installer
env currently doesn't need. The /usr/bin/* removal may not be
safe long-term, but it should be OK for now.
Signed-off-by: Adam Williamson <awilliam@redhat.com>
Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>