fix: remove trailing comma in prover url computed by benchmark script

Author: jpraynaud

mithril-test-lab/benchmark/aggregator-prover/benchmark-aggregator-prover.sh

@@ -117,7 +117,7 @@ RUN_STRESS_TEST() {
     TMP_FILE="test.tmp"
     echo ">> [#$INDEX_RUN/$TOTAL_RUN] Running stress test with $AB_TOTAL_REQUESTS requests with $TRANSACTIONS_PER_REQUEST transactions per request and $AB_CONCURRENCY concurrency"
     TRANSACTIONS_LIST=$(head -n $TRANSACTIONS_PER_REQUEST "$TRANSACTIONS_FILE" | tr "\n" ",")
-    AGGREGATOR_PROVER_URL="${AGGREGATOR_ENDPOINT}${AGGREGATOR_PROVER_ROUTE}?transaction_hashes=$TRANSACTIONS_LIST"
+    AGGREGATOR_PROVER_URL="${AGGREGATOR_ENDPOINT}${AGGREGATOR_PROVER_ROUTE}?transaction_hashes=${TRANSACTIONS_LIST::-1}"
     if ab -n $AB_TOTAL_REQUESTS -c $AB_CONCURRENCY -s "$AB_TIMEOUT" "$AGGREGATOR_PROVER_URL" > $TMP_FILE ; then
         REQUESTS_PER_SECOND=$(cat $TMP_FILE | awk '/Requests per second:/ {print $4}')
         if [[ $INDEX_RUN -eq 1 ]] ; then