Remove incorect configuration option.

Author: lohedges

src/somd2/runner/_base.py

@@ -1242,7 +1242,6 @@ def _compare_configs(config1, config2):
             "equilibration_timestep",
             "equilibration_constraints",
             "energy_frequency",
-            "save_trajectory",
             "frame_frequency",
             "save_velocities",
             "platform",