CI: Disable evb-ast2600

Currently, this platform is failing in CI due to seemingly platform
specific reasons. For now, remove it from CI until the maintainers have
a chance to look in to it.

Signed-off-by: Tom Rini <trini@konsulko.com>

.azure-pipelines.yml

@@ -420,10 +420,6 @@ stages:
           TEST_PY_BD: "evb-ast2500"
           TEST_PY_ID: "--id qemu"
           TEST_PY_TEST_SPEC: "not sleep"
-        evb_ast2600:
-          TEST_PY_BD: "evb-ast2600"
-          TEST_PY_ID: "--id qemu"
-          TEST_PY_TEST_SPEC: "not sleep"
         vexpress_ca9x4:
           TEST_PY_BD: "vexpress_ca9x4"
           TEST_PY_ID: "--id qemu"

.gitlab-ci.yml

@@ -328,13 +328,6 @@ evb-ast2500 test.py:
     TEST_PY_ID: "--id qemu"
   <<: *buildman_and_testpy_dfn
 
-evb-ast2600 test.py:
-  variables:
-    TEST_PY_BD: "evb-ast2600"
-    TEST_PY_TEST_SPEC: "not sleep"
-    TEST_PY_ID: "--id qemu"
-  <<: *buildman_and_testpy_dfn
-
 sandbox_flattree test.py:
   tags:
     - ${DEFAULT_AMD64_TAG}