remove cache=none from QEMU args as it is not supported on tmpfs/rootfs

uncloud/api/main.py

@@ -41,7 +41,7 @@ def handle_exception(e):
 
 
 class CreateVM(Resource):
-    '''API Request to Handle Creation of VM'''
+    """API Request to Handle Creation of VM"""
 
     @staticmethod
     def post():

uncloud/host/virtualmachine.py

@@ -42,7 +42,7 @@ class VM:
 
     def get_qemu_args(self):
         command = (
-            "-drive file={file},format=raw,if=virtio,cache=none"
+            "-drive file={file},format=raw,if=virtio"
             " -device virtio-rng-pci"
             " -m {memory} -smp cores={cores},threads={threads}"
             " -name {owner}_{name}"