[virt-tools-list] [PATCH virt-manager]: storage: remove cow as supported format

[Charles Arnold]

Support for this format was removed about a year ago from
qemu with this commit,

commit 550830f9351291c585c963204ad9127998b1c1ce
Author: Stefan Hajnoczi <stefanha at redhat.com>
Date:   Tue Sep 16 15:24:24 2014 +0100

    block: delete cow block driver

Signed-off-by: Charles Arnold <carnold at suse.com>

diff --git a/virtinst/storage.py b/virtinst/storage.py
index 24973d3..e50b78f 100644
--- a/virtinst/storage.py
+++ b/virtinst/storage.py
@@ -540,7 +540,7 @@ class StorageVolume(_StorageObject):
     """
     Base class for building and installing libvirt storage volume xml
     """
-    ALL_FORMATS = ["raw", "bochs", "cloop", "cow", "dmg", "iso", "qcow",
+    ALL_FORMATS = ["raw", "bochs", "cloop", "dmg", "iso", "qcow",
                    "qcow2", "qed", "vmdk", "vpc", "fat", "vhd", "vdi"]
 
     @staticmethod
@@ -741,7 +741,7 @@ class StorageVolume(_StorageObject):
 
     def list_create_formats(self):
         if self._supports_format():
-            return ["raw", "cow", "qcow", "qcow2", "qed", "vmdk", "vpc", "vdi"]
+            return ["raw", "qcow", "qcow2", "qed", "vmdk", "vpc", "vdi"]
         return None