oops typo

omc3/run_kmod.py

@@ -288,7 +288,7 @@ def create_lsa_results_file(betastar_required, instruments_found, results_df, in
         # We first make sure we don't try a concat operation if a df is empty
         # (otherwise pandas complains with a FutureWarning since 2.1.1)
         dfs_to_concat = [lsa_results_df, instrument_beta_df]
-        dfs_to_concat = [df for df in dfs_to_concat if not df.empty()]
+        dfs_to_concat = [df for df in dfs_to_concat if not df.empty]
 
         # We will raise for the user if there is no data in the DFs
         if not len(dfs_to_concat):