distro/el9: don't explicitly list rhc in Azure pkg set

`rhc` is part of the `@standard` package group, which is required by the
`@Server` package group included in the Azure pkg set. There's no need
to list it explicitly. This change has no effect on the Azure images
content.

Signed-off-by: Tomáš Hozza <[email protected]>

pkg/distro/rhel9/azure.go

@@ -149,14 +149,6 @@ func azureCommonPackageSet(t *imageType) rpmmd.PackageSet {
 		},
 	}.Append(distroSpecificPackageSet(t))
 
-	if t.arch.distro.isRHEL() {
-		ps.Append(rpmmd.PackageSet{
-			Include: []string{
-				"rhc",
-			},
-		})
-	}
-
 	return ps
 }