$ sudo apt remove clang-9


output:

WARNING: apt does not have a stable CLI interface. Use with caution in scripts.

Reading package lists...
Building dependency tree...
Reading state information...
The following packages were automatically installed and are no longer required:
  libclang-common-9-dev libclang-cpp9 libobjc-8-dev libomp-9-dev libomp5-9
  libstdc++-8-dev
Use 'sudo apt autoremove' to remove them.
The following packages will be REMOVED:
  clang-9 linux-image-5.3.0-23-generic
0 upgraded, 0 newly installed, 2 to remove and 3 not upgraded.
2 not fully installed or removed.
After this operation, 15.1 MB disk space will be freed.
Do you want to continue? [Y/n] (Reading database ...
(Reading database ... 5%
(Reading database ... 10%
(Reading database ... 15%
(Reading database ... 20%
(Reading database ... 25%
(Reading database ... 30%
(Reading database ... 35%
(Reading database ... 40%
(Reading database ... 45%
(Reading database ... 50%
(Reading database ... 55%
(Reading database ... 60%
(Reading database ... 65%
(Reading database ... 70%
(Reading database ... 75%
(Reading database ... 80%
(Reading database ... 85%
(Reading database ... 90%
(Reading database ... 95%
(Reading database ... 100%
(Reading database ... 373577 files and directories currently installed.)
Removing linux-image-5.3.0-23-generic (5.3.0-23.25) ...
/etc/kernel/postrm.d/initramfs-tools:
update-initramfs: Deleting /boot/initrd.img-5.3.0-23-generic
/etc/kernel/postrm.d/zz-update-grub:
Sourcing file `/etc/default/grub'
Sourcing file `/etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found linux image: vmlinuz-5.3.0-24-generic in bandit/ROOT/ubuntu-1
Found initrd image: initrd.img-5.3.0-24-generic in bandit/ROOT/ubuntu-1
Found linux image: vmlinuz-5.3.0-26-generic in bandit/ROOT/ubuntu-1
Found initrd image: initrd.img-5.3.0-26-generic in bandit/ROOT/ubuntu-1
Found linux image: vmlinuz-4.18.0-10-generic in bandit/ROOT/ubuntu-1@pre-reboot
Found initrd image: initrd.img-4.18.0-10-generic in bandit/ROOT/ubuntu-1@pre-reboot
Found linux image: vmlinuz-4.18.0-10-generic in bandit/ROOT/ubuntu-1@post-reboot
Found initrd image: initrd.img-4.18.0-10-generic in bandit/ROOT/ubuntu-1@post-reboot
Found linux image: vmlinuz-4.18.0-10-generic in bandit/ROOT/ubuntu-1@post-reboot-updates
Found initrd image: initrd.img-4.18.0-10-generic in bandit/ROOT/ubuntu-1@post-reboot-updates
Found linux image: vmlinuz-4.18.0-15-generic in bandit/ROOT/ubuntu-1@post-reboot-updates
Found initrd image: initrd.img-4.18.0-15-generic in bandit/ROOT/ubuntu-1@post-reboot-updates
Found memtest86+ image: /ROOT/ubuntu-1@/boot/memtest86+.elf
Found memtest86+ image: /ROOT/ubuntu-1@/boot/memtest86+.bin
device-mapper: reload ioctl on osprober-linux-nvme1n1p1  failed: Device or resource busy
Command failed.
error: invalid volume.
grub-probe: error: cannot find a GRUB drive for /dev/sda1.  Check your device.map.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
Found Windows 10 on /dev/sdb1
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: invalid volume.
error: syntax error.
error: Incorrect command.
error: syntax error.
Syntax error at line 185
Syntax errors are detected in generated GRUB config file.
Ensure that there are no errors in /etc/default/grub
and /etc/grub.d/* files or please file a bug report with
/boot/grub/grub.cfg.new file attached.
run-parts: /etc/kernel/postrm.d/zz-update-grub exited with return code 1
dpkg: error processing package linux-image-5.3.0-23-generic (--remove):
 installed linux-image-5.3.0-23-generic package post-removal script subprocess returned error exit status 1
dpkg: too many errors, stopping
Errors were encountered while processing:
 linux-image-5.3.0-23-generic
Processing was halted because there were too many errors.
E: Sub-process /usr/bin/dpkg returned an error code (1)