Remove STACK_VERSION variable

Signed-off-by: Rushi Agrawal <rushi.agr@gmail.com>

.ci/functions/imports.sh

@@ -4,16 +4,6 @@
 #
 # Version 1.0.1
 # - Initial version after refactor
-# - Validate STACK_VERSION asap
-
-function require_stack_version() {
-  if [[ -z $STACK_VERSION ]]; then
-    echo -e "\033[31;1mERROR:\033[0m Required environment variable [STACK_VERSION] not set\033[0m"
-    exit 1
-  fi
-}
-
-require_stack_version
 
 if [[ -z $es_node_name ]]; then
   # only set these once
@@ -33,7 +23,7 @@ if [[ -z $es_node_name ]]; then
 
   export elasticsearch_url=$ELASTICSEARCH_URL_EXTENSION://${es_node_name}:9200
   export external_elasticsearch_url=${elasticsearch_url/$es_node_name/localhost}
-  export elasticsearch_container="${elasticsearch_image}:${STACK_VERSION}"
+  export elasticsearch_container="${elasticsearch_image}:latest"
 
   export suffix=rest-test
   export moniker=$(echo "$elasticsearch_container" | tr -C "[:alnum:]" '-')

.ci/run-tests

@@ -5,7 +5,6 @@
 # - Add `$RUNSCRIPTS` env var for running Elasticsearch dependent products
 
 # Default environment variables
-export STACK_VERSION="${STACK_VERSION:=latest}"
 export TEST_SUITE="${TEST_SUITE:=oss}"
 export PYTHON_VERSION="${PYTHON_VERSION:=3.9}"
 export PYTHON_CONNECTION_CLASS="${PYTHON_CONNECTION_CLASS:=Urllib3HttpConnection}"
@@ -16,7 +15,7 @@ script_path=$(dirname $(realpath -s $0))
 source $script_path/functions/imports.sh
 set -euo pipefail
 
-echo -e "\033[1m>>>>> Start [$STACK_VERSION container] >>>>>>>>>>>>>>>>>>>>>>>>>>>>>\033[0m"
+echo -e "\033[1m>>>>> Start server container >>>>>>>>>>>>>>>>>>>>>>>>>>>>>\033[0m"
 DETACH=true bash .ci/run-elasticsearch.sh
 
 if [[ -n "$RUNSCRIPTS" ]]; then

.ci/test-matrix.yml

@@ -1,6 +1,3 @@
-STACK_VERSION:
-  - 7.10.2
-
 TEST_SUITE:
   - oss