fix: remove benchmark in sandbox

Author: Daanvdplas

Cargo.lock

@@ -62,12 +62,4 @@ std = [
 	"sp-externalities/std",
 	"sp-io/std",
 	"ink_e2e_macro/std",
-]
-runtime-benchmarks = [
-	"frame-support/runtime-benchmarks",
-	"frame-system/runtime-benchmarks",
-	"pallet-assets/runtime-benchmarks",
-	"pallet-balances/runtime-benchmarks",
-	"pallet-revive/runtime-benchmarks",
-	"pallet-timestamp/runtime-benchmarks",
-]
+]