Disable swap

If you have GParted open, close it. Its Swapoff feature does not appear to to be permanent.

Open terminal and become root (su); if you have sudo enabled, you may also do for example sudo -i; see man sudo for all options):

sudo -i (Or use sudo for each command)

Turn off the particular swap partition and / or all of the swaps:

swapoff --all

Make 100% sure the particular swap partition partition is off:

cat /proc/swaps

Open a text editor you are skilled in with this file, e.g. nano if unsure:

nano /etc/fstab

Comment out / remove the swap partition's UUID, e.g.:

# UUID=1d3c29bb-d730-4ad0-a659-45b25f60c37d    none    swap    sw    0    0

Open a text editor you are skilled in with this file, e.g. nano if unsure:

 nano /etc/initramfs-tools/conf.d/resume

Comment out / remove / change with 'none' the previously identified swap partition's UUID, e.g.:

RESUME=none

If your swap is encrypted, do the same with /etc/crypttab.