doc: remove "gpu" parameter when pass-thru IGD

remove "gpu" parameter when pass-thru IGD

Tracked-On: #6357

Signed-off-by: Liu,Junming <junming.liu@intel.com>

doc/tutorials/gpu-passthru.rst

@@ -89,7 +89,7 @@ Passthrough the GPU to Guest
      echo "0000:00:02.0" > /sys/bus/pci/devices/0000:00:02.0/driver/unbind
      echo "0000:00:02.0" > /sys/bus/pci/drivers/pci-stub/bind
 
-   Replace ``-s 2,pci-gvt -G "$2" \`` with ``-s 2,passthru,0/2/0,gpu \``
+   Replace ``-s 2,pci-gvt -G "$2" \`` with ``-s 2,passthru,0/2/0 \``
 
 4. Run ``launch_win.sh``.
 

doc/tutorials/using_windows_as_uos.rst

@@ -104,7 +104,7 @@ Prepare the Script to Create an Image
    #for memsize setting
    mem_size=4096M
    acrn-dm -A -m $mem_size -s 0:0,hostbridge -s 1:0,lpc -l com1,stdio \
-     -s 2,passthru,0/2/0,gpu \
+     -s 2,passthru,0/2/0 \
      -s 8,virtio-net,tap0 \
      -s 4,virtio-blk,/home/acrn/work/win10-ltsc.img
      -s 5,ahci,cd:/home/acrn/work/Windows10.iso \
@@ -262,7 +262,7 @@ Explanation for acrn-dm Popular Command Lines
 .. note:: Use these acrn-dm command line entries according to your
    real requirements.
 
-* ``-s 2,passthru,0/2/0,gpu``:
+* ``-s 2,passthru,0/2/0``:
   This is GVT-d to passthrough the VGA controller to Windows.
   You may need to change 0/2/0 to match the bdf of the VGA controller on your platform.