Remove two manual tests which aren't suitable for Interop

Author: jgraham

css/css-writing-modes/META.yml

@@ -1413,8 +1413,6 @@ links:
         - test: line-box-direction-srl-059.xht
         - test: link-writing-mode-dependency-crash.html
         - test: logical-physical-mapping-001.html
-        - test: page-flow-direction-slr-005.xht
-        - test: page-flow-direction-srl-004.xht
         - test: row-progression-slr-023.xht
         - test: row-progression-slr-029.xht
         - test: row-progression-srl-022.xht