There are a few different ways to delete a stubborn partition, depending on the operating system you're using.
If you're using Windows, you can use the Disk Management tool to delete the partition. To do this, open the Disk Management tool (press the Windows key + R, type diskmgmt.msc, and press Enter), right-click on the partition you want to delete, and select Delete Volume.
If you're using macOS, you can use the Disk Utility tool to delete the partition. To do this, open the Disk Utility tool (press the Command key + Space, type Disk Utility, and press Enter), select the partition you want to delete, and click the Delete button.
If you're using Linux, you can use the fdisk or parted tools to delete the partition. To do this, open a terminal window and type the following commands:
fdisk /dev/sda
Delete the desired partition by typing d and then the number of the partition you want to delete.
For example, to delete partition 3, you would type d, 3.
Type w to write the changes to the disk.
Or
parted /dev/sda