Remove yang OC models

[dplore]

Removing the openconfig yang models from the gNSI repository as they are now moved to the openconfig public repository via openconfig/public#1037

[brianneville]

openconfig/public#1037 included an outdated version of gNSI Certz, which has been since updated so that the counter names are different (connection-accepts/connection-rejects/last-connection-accept/last-connection-reject vs access-accepts/access-rejects/last-access-accept/last-access-reject), and the description of these counters has been updated.

see:

gnsi/certz/gnsi-certz.yang

Lines 84 to 109 in e05f3dc

	"A collection of counters that were collected by the gRPC during
	the authentication process.";
	leaf connection-rejects {
	type oc-yang:counter64;
	description
	"The total number of times that gRPC clients have failed
	in establishing a connection to the server.";
	}
	leaf last-connection-reject {
	type oc-types:timeticks64;
	description
	"A timestamp of the last time a gRPC client failed
	in establishing a connection to the server.";
	}
	leaf connection-accepts {
	type oc-yang:counter64;
	description
	"The total number of times that gRPC clients have succeeded
	in establishing a connection to the server.";
	}
	leaf last-connection-accept {
	type oc-types:timeticks64;
	description
	"A timestamp of the last time a gRPC client succeeded
	in establishing a connection to the server.";

modified as of #156

[brianneville]

I've opened a PR to resolve this, please take a look:
openconfig/public#1061

[dplore]

Thanks, will wait to merge this until the changes you proposed are merged just for ease of reference

[dplore]

@marcushines could use your approval to merge this to prevent confusion (such as #175 )

[haussli]

Please mention in the respective READMEs that the models have moved and whither.

[dplore]

Please mention in the respective READMEs that the models have moved and whither.

Done