Drop unused kernel build script

1 job for cleanup in 9 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #332464
librem5
job

00:00:09

 
Name Stage Failure
failed
job Test
Setting up make (4.2.1-1.2) ...
Setting up libatomic1:amd64 (8.3.0-6) ...
Setting up shellcheck (0.5.0-3) ...
Processing triggers for libc-bin (2.28-10) ...
$ make check
shellcheck -x ./build-image ./root.sh build/build_kernel_deb.sh
build/build_kernel_deb.sh: build/build_kernel_deb.sh: openBinaryFile: does not exist (No such file or directory)
make: *** [Makefile:58: check] Error 2
ERROR: Job failed: exit code 1