core/gnome-music.bst: remove libgd submodule

See gnome-music@0be1cca3

Part-of: <!1132>
9 jobs for abderrahim/music-libgd in 123 minutes and 11 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Track
passed #1279924
x86_64 gnome-build-meta
track

00:05:34

 
  Build
passed #1279927
aarch64 gnome-build-meta
build-aarch64

01:57:36

passed #1279926
x86_64 gnome-build-meta
build-i386

00:34:57

failed #1279928
ppc64le gnome-build-meta allowed to fail
build-ppc64le

00:01:03

passed #1279925
x86_64 gnome-build-meta
build-x86_64

00:56:31

 
  Deploy
manual #1279932
x86_64 gnome-build-meta allowed to fail manual
iso-installer-x86_64
manual #1279931
aarch64 gnome-build-meta allowed to fail manual
raspberrypi-4-image
manual #1279930
aarch64 gnome-build-meta allowed to fail manual
rock64-image
manual #1279929
x86_64 gnome-build-meta allowed to fail manual
vm-image-x86_64
 
Name Stage Failure
failed
build-ppc64le Build
Fetching changes...
Reinitialized existing Git repository in /builds/GNOME/gnome-build-meta/.git/
fatal: not a git repository (or any parent up to mount point /)
Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set).
Uploading artifacts for failed job
Uploading artifacts...
logs: found 2136 matching files and directories

Uploading artifacts as "archive" to coordinator... ok
id=1279928 responseStatus=201 Created token=ZzFxrzhp
ERROR: Job failed: exit code 1