[sonic-head.yang]: Removing duplicate definition and file for sonic-e…#64

Merged

praveen-li merged 1 commit intozhenggen-xu:sonic-cfg-mgmtfrom praveen-li:clean_up_yang_models

May 1, 2020

-32

Commits on Apr 8, 2020

[sonic-head.yang]: Removing duplicate definition and file for sonic-extension.
Praveen Chaudhary
committed