[memcpy] Remove unused dump from kernel #1266

Job	Run time
check-opcodes	4s
riscv-isa-sim	10s
tc-llvm	3m 55s
tc-gcc	1m 35s
verilator	11s
verilator-model (minpool)	12s
verilator-model (mempool)	10s
build-apps-gcc (minpool)	55s
build-apps-omp (minpool)	31s
build-apps-omp (mempool)	39s
build-apps-gcc (mempool)	51s
unit-test	1m 20s
check-bootrom	17s
run-apps-gcc (minpool)	22s
run-apps-gcc (mempool)	1m 32s
tc-halide	13s
build-apps-llvm (minpool)	1m 11s
build-apps-llvm (mempool)	1m 5s
build-apps-halide (minpool)	57s
build-apps-halide (mempool)	1m 7s
run-apps-llvm (minpool)	23s
run-apps-llvm (mempool)	1m 42s
run-apps-halide (minpool)	30s
run-apps-halide (mempool)	1m 32s
clean-up-compile-runs (minpool)	3s
clean-up	4s
clean-up-compile-runs (mempool)	3s
	21m 34s

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