gitlab-ci: fix metadata_v0 test for new buildozer build flag
gitlab-ci: fix metadata_v0 test for new buildozer build flag

Just remove it, since 0.7.0 does not know about that build flag.

fdroidtravis/fdroidserver,f-droid/fdroid-server,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server,f-droid/fdroid-server,f-droid/fdroid-server,f-droid/fdroidserver,f-droid/fdroidserver,f-droid/fdroid-server,fdroidtravis/fdroidserver,f-droid/fdroidserver,f-droid/fdroidserver,fdroidtravis/fdroidserver