Remove db deletion from SearchMolecularFormulasLC and associated test

Author: kheal

corems/molecular_id/search/molecularFormulaSearch.py

@@ -906,10 +906,6 @@ def __init__(self, lcms_obj, sql_db=None, first_hit=False, find_isotopologues=Tr
         else:
             self.sql_db = sql_db
 
-    def delete_db(self):
-        """Delete the database."""
-        self.sql_db.purge()
-
     def search_spectra_against_candidates(self, mass_spectrum_list, ms_peaks_list, candidate_formulas, ion_type, ion_charge):
         """Search a list of mass spectra against a list of candidate formulas with a given ion type and charge.
 

tests/test_wf_lipidomics.py

@@ -131,7 +131,6 @@ def test_lipidomics_workflow():
     # Perform a molecular search on a few of the mass features
     mol_form_search = SearchMolecularFormulasLC(myLCMSobj)
     mol_form_search.run_mass_feature_search()
-    mol_form_search.delete_db()
 
     # Check results of molecular search
     assert myLCMSobj.mass_features[0].ms1_peak[0].string == "C20 H30 O2"