[CODEOWNERS] Fix linter issues (Azure#48203)

The focus of these changes is to remove invalid owners being flagged by linter runs.

Author: jsquire

.github/CODEOWNERS

@@ -970,12 +970,6 @@
 # ServiceLabel: %Astronomer %Mgmt
 # ServiceOwners:                                                   @banggaurav
 
-# PRLabel: %Azure Stack Hci
-/sdk/azurestackhci/Azure.ResourceManager.Hci/                      @priyjain358
-
-# ServiceLabel: %Azure Stack Hci %Mgmt
-# ServiceOwners:                                                   @priyjain358
-
 # PRLabel: %Communication - Resource Manager
 /sdk/communication/Azure.ResourceManager.Communication/            @archerzz @ArcturusZhang @ArthurMa1978