Generate-weights: Uncommnet benchmark lines for pallet_utility & pallet_session

scripts/generate-weights.sh

@@ -34,8 +34,8 @@ benchmark() {
 # So uncomment this when we move to a version that contains that PR.
 # See issue: #1979
 # benchmark frame_system
-# benchmark pallet_utility
-# benchmark pallet_session
+benchmark pallet_utility
+benchmark pallet_session
 # benchmark pallet_timestamp
 
 # This benchmark takes too long with 50 steps and 20 repeats in a normal laptop.