disk_format: remove QED format from disk format test

QED is an improvement of qcow2 by removing the refcount table.
Now all the improvements have been merged into qcow2, and the
development of QED has been abandon. Also, it is not
recommended to use and deprecated in QEMU upstream change log.
So remove it from the test cases.
Signed-off-by: NTingting Mao <timao@redhat.com>

qemu/tests/cfg/qemu_disk_img.cfg

@@ -2,7 +2,7 @@
 # For windows guest, you can download md5sum.exe from http://www.brothersoft.com/md5sum-81781.html,
 # then add parents dir to $PATH or config md5sum in share/cfg/guest-os/Windows.cfg;
 - qemu_disk_img:
-    no qed raw vmdk
+    no raw vmdk
     virt_test_type = qemu
     type = qemu_disk_img
     image_chain= "image1"

qemu/tests/cfg/qemu_img.cfg

@@ -12,9 +12,7 @@
             remove_image_dd = yes
             create_image_cmd = "dd if=/dev/zero of=%s bs=1G count=1"
             # Test the conversion from 'dd_image_name' to specified format
-            supported_image_formats = qcow2 raw qed
-            Host_RHEL.m5:
-                supported_image_formats = qcow2 raw
+            supported_image_formats = qcow2 raw
         - create:
             subcommand = create
             images += " large"
@@ -77,10 +75,6 @@
                                     check_output = stderr
                 - to_raw:
                     dest_image_format = raw
-                - to_qed:
-                    no Host_RHEL
-                    no (image_backend=gluster)
-                    dest_image_format = qed
 
         - snapshot:
             subcommand = snapshot
@@ -88,7 +82,7 @@
         - info:
             subcommand = info
         - rebase:
-            no raw vmdk qed
+            no raw vmdk
             subcommand = rebase
             image_name_snapshot1 = "images/sn1"
             image_name_snapshot2 = "images/sn2"
@@ -106,7 +100,7 @@
                             check_output = stderr
         # Commit is the only subtest that does need an installed guest
         - commit:  install setup image_copy unattended_install.cdrom
-            no vmdk raw qed
+            no vmdk raw
             subcommand = commit
         - amend:
             no Host_RHEL.m6

qemu/tests/cfg/qemu_iotests.cfg

@@ -19,10 +19,6 @@
         - qcow2_format:
             only qcow2 qcow2v3
             qemu_io_image_format = qcow2
-        - qed_format:
-            only qed
-            no Host_RHEL
-            qemu_io_image_format = qed
         - vdi_format:
             no Host_RHEL
             qemu_io_image_format = vdi