Remove opensuse related funtests

https://zuul.opendev.org/t/openstack/builds?job_name=dib-functests&project=openstack/diskimage-builder
is currently broken and is not actively maintained.

In order to get other DIB patches in, It removes the
testing of opensuse element.

Signed-off-by: Chandan Kumar (raukadah) <chkumar@redhat.com>
Change-Id: I7ff67208f24369944106a7fed59487f0fcab0ecb

.zuul.d/jobs.yaml

@@ -27,8 +27,6 @@
         - centos/8-stream-build-succeeds
         - centos/9-stream-build-succeeds
         - fedora/build-succeeds
-        - opensuse/build-succeeds
-        - opensuse/opensuse15-build-succeeds
         - ubuntu/bionic-build-succeeds
         - ubuntu/focal-build-succeeds
 

tests/run_functests.sh

@@ -37,8 +37,6 @@ DEFAULT_SKIP_TESTS=(
     # These download base images which has shown to be very unreliable
     # in the gate.  Keep them in a -nv job until we can figure out
     # better caching for the images
-    opensuse/build-succeeds
-    opensuse/opensuse15-build-succeeds
     centos7/build-succeeds
     debian/build-succeeds
     fedora/build-succeeds