[GEN-2210] Fix setting of skip_mutationsincis flag for staging (#603)

* remove skip_mutationsincis flag

* intentionally set skip_mutationsincis = False

* remove setting flags

Author: rxu17

bin/database_to_staging.py

@@ -179,7 +179,6 @@ def main(
         databaseSynIdMappingId = "syn11600968"
         genie_version = "TESTING"
     elif staging:
-        skip_mutationsincis = True
         databaseSynIdMappingId = "syn12094210"
     else:
         databaseSynIdMappingId = "syn10967259"