HMS-2191 refactor: remove metrics openapi

This change remove metrics.openapi.* files, and update Makefile according to
that.

This is a special case as the /openapi.json endpoint, and to achieve this to
work, the openapi file becomes invalid with the specification for the path of
the endpoint; be aware the /metrics path could differ and the port where it will
be listening, depending on the clowder configuration.

Signed-off-by: Alejandro Visiedo <avisiedo@redhat.com>

Makefile

@@ -43,7 +43,6 @@ $(OAPI_CODEGEN):
 oapi-codegen: \
 		$(TMP)/public/spec.gen.go $(TMP)/public/server.gen.go $(TMP)/public/types.gen.go \
 		$(TMP)/internal/spec.gen.go $(TMP)/internal/server.gen.go $(TMP)/internal/types.gen.go \
-		$(TMP)/metrics/spec.gen.go $(TMP)/metrics/server.gen.go $(TMP)/metrics/types.gen.go
 
 $(TMP)/%/spec.gen.go: %.openapi.yaml $(OAPI_CODEGEN)
 	@mkdir -p $(dir $@)
@@ -61,7 +60,6 @@ $(TMP)/%/types.gen.go: %.openapi.yaml $(OAPI_CODEGEN)
 validate: $(VALIDATOR)
 	$(VALIDATOR) public.openapi.yaml
 	$(VALIDATOR) internal.openapi.yaml
-	$(VALIDATOR) metrics.openapi.yaml
 
 .PHONY: openapi-sort
 openapi-sort: $(PYTHON_VENV)
@@ -71,7 +69,6 @@ openapi-sort: $(PYTHON_VENV)
 vacuum: $(NODE_BIN)/vacuum
 	npm run vacuum:lint public.openapi.yaml
 	npm run vacuum:lint internal.openapi.yaml
-	npm run vacuum:lint metrics.openapi.yaml
 
 .PHONY: swagger-editor
 swagger-editor:
@@ -88,7 +85,7 @@ swagger-editor-stop:
 	podman stop $(SWAGGER_CONTAINER)
 
 .PHONY: generate-json
-generate-json: public.openapi.json internal.openapi.json metrics.openapi.json
+generate-json: public.openapi.json internal.openapi.json
 
 %.openapi.json: %.openapi.yaml $(PYTHON_VENV)
 	$(PYTHON_VENV) yaml2json.py $< $@