benchmark script void output file name (#2998)

cumulus/scripts/benchmarks-ci.sh

@@ -31,11 +31,11 @@ fi
 
 for pallet in ${pallets[@]}
 do
-	output_file="${pallet//::/_}"
+	output_dir=""
 	extra_args=""
 	# a little hack for pallet_xcm_benchmarks - we want to force custom implementation for XcmWeightInfo
 	if [[ "$pallet" == "pallet_xcm_benchmarks::generic" ]] || [[ "$pallet" == "pallet_xcm_benchmarks::fungible" ]]; then
-		output_file="xcm/$output_file"
+		output_dir="xcm/"
 		extra_args="--template=./templates/xcm-bench-template.hbs"
 	fi
 	$artifactsDir/polkadot-parachain benchmark pallet \
@@ -48,5 +48,5 @@ do
 		--repeat=$repeat \
 		--json \
 		--header=./file_header.txt \
-		--output="${benchmarkOutput}/${output_file}.rs" >> $artifactsDir/${pallet}_benchmark.json
+		--output="${benchmarkOutput}/${output_dir}" >> $artifactsDir/${pallet}_benchmark.json
 done