Drop openEuler support

The job is broken since it is running with python3.7 and most services
now require at least python3.8.

Signed-off-by: Dr. Jens Harbott <harbott@osism.tech>
Change-Id: Ie21f71acffabd78c79e2b141951ccf30a5c06445
diff --git a/doc/source/index.rst b/doc/source/index.rst
index feb50ce..08ce4cb 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -38,7 +38,7 @@
 
 Start with a clean and minimal install of a Linux system. DevStack
 attempts to support the two latest LTS releases of Ubuntu, the
-latest/current Fedora version, CentOS/RHEL 8, OpenSUSE and openEuler.
+latest/current Fedora version, CentOS/RHEL 8 and OpenSUSE.
 
 If you do not have a preference, Ubuntu 20.04 (Focal Fossa) is the
 most tested, and will probably go the smoothest.