Fix unused variable warning (#2018) #494

Job	Run time
HOST,bknd=omp,cmplr=clang++,macos-latest,std=c++17,cfg=release	5m 3s
clang-format	0s
CPU,bknd=dpcpp,cmplr=icpx,ubuntu-latest,std=с++17,cfg=release	14m 40s
HOST,bknd=tbb,cmplr=icx-cl,windows-latest,std=c++17,cfg=release	19m 6s
FPGA_EMU,bknd=dpcpp,cmplr=icpx,ubuntu-latest,std=с++17,cfg=release	25m 14s
HOST,bknd=tbb,cmplr=cl,windows-latest,std=c++17,cfg=release	16m 51s
HOST,bknd=tbb,cmplr=icpx,ubuntu-latest,std=с++17,cfg=release	11m 26s
CPU,bknd=dpcpp,cmplr=icx,windows-latest,std=c++17,cfg=release	10m 53s
HOST,bknd=omp,cmplr=icpx,ubuntu-latest,std=с++17,cfg=release	9m 25s
HOST,bknd=omp,cmplr=g++,ubuntu-latest,std=с++17,cfg=release	6m 13s
HOST,bknd=tbb,cmplr=g++,ubuntu-latest,std=с++17,cfg=release	9m 53s
HOST,bknd=tbb,cmplr=g++,ubuntu-latest,std=с++17,cfg=release	9m 26s
HOST,bknd=tbb,cmplr=clang++,ubuntu-latest,std=с++17,cfg=release	10m 41s
HOST,bknd=omp,cmplr=clang++,ubuntu-latest,std=с++17,cfg=release	7m 59s
HOST,bknd=tbb,cmplr=clang++,ubuntu-latest,std=с++17,cfg=release	10m 42s
HOST,bknd=tbb,cmplr=icpx,ubuntu-latest,std=с++17,cfg=release	11m 25s
HOST,bknd=serial,cmplr=g++,ubuntu-latest,std=с++17,cfg=release	5m 5s
CPU,bknd=dpcpp,cmplr=icpx,ubuntu-latest,std=с++20,cfg=release	27m 22s
HOST,bknd=tbb,cmplr=icpx,ubuntu-latest,std=с++20,cfg=release	16m 53s
HOST,bknd=omp,cmplr=icpx,ubuntu-latest,std=с++20,cfg=release	17m 41s
	4h 5m 58s

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