Update CODEOWNERS (Azure#13310)

Author: leniatgh

CODEOWNERS

@@ -84,4 +84,3 @@
 /specification/**/resource-manager/**/readme.cli.md @jsntcy @qiaozha
 /specification/**/resource-manager/**/readme.go.md @ArcturusZhang
 /specification/**/resource-manager/**/readme.python.md @jsntcy @msyyc
-/specification/**/resource-manager/**/readme.azureresourceschema.md @leni-msft