doc: remove "pincpu" option description
Update the document becase the "pincpu" option is removed.
@@ -160,14 +160,6 @@ Here are descriptions for each of these ``acrn-dm`` command line parameters:
``seed_string=${mac:9:8}-${vm_name}``
- * - :kbd:`-p, --pincpu <vcpu:hostcpu>`
- - Pin host CPU to appointed vCPU:
-
- - ``vcpu`` is the ID of the CPU seen by the UOS, and
- - ``hostcpu`` is the physical CPU ID on the system.
-
- Example: ``-p "1:2"`` means pin the 2nd physical cpu to 1st vcpu in UOS
-
* - :kbd:`--part_info <part_info_name>`
- Set guest partition info path.
