updated curve detection. There might be a bug in nbit calculation for levels...

updated curve detection. There might be a bug in nbit calculation for levels generated using the editor notebook

flatland/envs/rail_env.py

@@ -1024,7 +1024,6 @@ class RailEnv(Environment):
                 while tmp > 0:
                     nbits += (tmp & 1)
                     tmp = tmp >> 1
-                print(nbits)
                 movement = direction
                 if action == 1:
                     movement = direction - 1