[AKS] clean up some dead code (#9768)

Author: runzhen

src/aks-preview/HISTORY.rst

@@ -11,6 +11,7 @@ To release a new version, please select a new version number (usually plus 1 to
 
 Pending
 +++++++
+* `az aks nodepool update`: clean up some useless code in the update managed gpu function. 
 * `az aks machine add`: Add `--spot-max-price` flag support to set the max price (in US Dollars) you are willing to pay for spot instances on a machine.
 * `az aks machine add`: Add `--eviction-policy` flag support to set the eviction policy for a machine.
 * `az aks machine add`: Add `--enable-ultra-ssd` flag support to enable ultra ssd on a machine.

src/aks-preview/azext_aks_preview/agentpool_decorator.py

@@ -1826,16 +1826,10 @@ def update_managed_gpu(self, agentpool: AgentPool) -> AgentPool:
                 agentpool.gpu_profile = self.models.GPUProfile()  # pylint: disable=no-member
             if agentpool.gpu_profile.nvidia is None:
                 agentpool.gpu_profile.nvidia = self.models.NvidiaGPUProfile()  # pylint: disable=no-member
-            # Check if already set to the desired value to avoid API error
-            if agentpool.gpu_profile.nvidia.management_mode == CONST_GPU_MANAGEMENT_MODE_MANAGED:
-                return agentpool
             agentpool.gpu_profile.nvidia.management_mode = CONST_GPU_MANAGEMENT_MODE_MANAGED
             agentpool.gpu_profile.driver = CONST_GPU_DRIVER_INSTALL
         else:
             if agentpool.gpu_profile and agentpool.gpu_profile.nvidia:
-                # Check if already set to the desired value to avoid API error
-                if agentpool.gpu_profile.nvidia.management_mode == CONST_GPU_MANAGEMENT_MODE_UNMANAGED:
-                    return agentpool
                 agentpool.gpu_profile.nvidia.management_mode = CONST_GPU_MANAGEMENT_MODE_UNMANAGED
 
         return agentpool