feat: remove dependency on mvn from updating script

Author: tomplus

scripts/update-client.sh

@@ -21,11 +21,6 @@ set -o errexit
 set -o nounset
 set -o pipefail
 
-if ! which mvn > /dev/null 2>&1; then
-  echo "Maven is not installed."
-  exit
-fi
-
 SCRIPT_ROOT=$(dirname "${BASH_SOURCE}")
 CLIENT_ROOT="${SCRIPT_ROOT}/../kubernetes"
 CLIENT_VERSION=$(python "${SCRIPT_ROOT}/constants.py" CLIENT_VERSION)