Remove kernel_path from launch_cvd incantation

kernel_path is transferred by fetcher config. No need to pass it
manually.

Bug: 169261091
Test: acloud-dev create --build_target aosp_cf_x86_64_phone-userdebug \
    --branch aosp-master --autoconnect --kernel_build_target \
    kernel_virt_x86_64 --kernel_branch \
    aosp_kernel-common-android-mainline
Change-Id: Id75b96c443bff6f4cf814d6acbc396af2403b1d2
diff --git a/internal/lib/cvd_compute_client_multi_stage.py b/internal/lib/cvd_compute_client_multi_stage.py
index fc729b7..bdb10cd 100644
--- a/internal/lib/cvd_compute_client_multi_stage.py
+++ b/internal/lib/cvd_compute_client_multi_stage.py
@@ -331,9 +331,6 @@
             launch_cvd_args.append("-y_res=" + resolution[1])
             launch_cvd_args.append("-dpi=" + resolution[3])
 
-        if kernel_build:
-            launch_cvd_args.append("-kernel_path=kernel")
-
         if self._launch_args:
             launch_cvd_args.append(self._launch_args)