ci: Remove unnecessary MODE declarations

.github/workflows/scripts/lib/testing.sh

@@ -15,7 +15,7 @@ function container_id {
 	local svc=$1
 
 	local label
-	if [[ "$MODE" == "swarm" ]]; then
+	if [[ "${MODE:-}" == "swarm" ]]; then
 		label="com.docker.swarm.service.name=elk_${svc}"
 	else
 		label="com.docker.compose.service=${svc}"
@@ -50,7 +50,7 @@ function service_ip {
 
 	local ip
 
-	if [[ "$MODE" == "swarm" ]]; then
+	if [[ "${MODE:-}" == "swarm" ]]; then
 		#ingress_net="$(docker network inspect ingress --format '{{ .Id }}')"
 		#ip="$(docker service inspect elk_"$svc" --format "{{ range .Endpoint.VirtualIPs }}{{ if eq .NetworkID \"${ingress_net}\" }}{{ .Addr }}{{ end }}{{ end }}" | cut -d/ -f1)"
 		node="$(docker node ls --format '{{ .ID }}')"

.github/workflows/scripts/run-tests-apm-server.sh

@@ -7,9 +7,6 @@ set -o pipefail
 source "$(dirname ${BASH_SOURCE[0]})/lib/testing.sh"
 
 
-declare MODE=""
-
-
 cid="$(container_id apm-server)"
 ip="$(service_ip apm-server)"
 

.github/workflows/scripts/run-tests-core.sh

@@ -7,11 +7,6 @@ set -o pipefail
 source "$(dirname ${BASH_SOURCE[0]})/lib/testing.sh"
 
 
-declare MODE=""
-if [ "$#" -ge 1 ]; then
-	MODE=$1
-fi
-
 cid_es="$(container_id elasticsearch)"
 cid_ls="$(container_id logstash)"
 cid_kb="$(container_id kibana)"

.github/workflows/scripts/run-tests-enterprise-search.sh

@@ -7,9 +7,6 @@ set -o pipefail
 source "$(dirname ${BASH_SOURCE[0]})/lib/testing.sh"
 
 
-declare MODE=""
-
-
 cid_es="$(container_id elasticsearch)"
 cid_en="$(container_id enterprise-search)"