Allow ispyb_web to remove ligand references

Author: gfrn

grants/ispyb_web.sql

@@ -57,8 +57,8 @@ GRANT INSERT, UPDATE, DELETE ON Project_has_User TO 'ispyb_web';
 GRANT INSERT, UPDATE, DELETE ON Project_has_XFEFSpectrum TO 'ispyb_web';
 
 GRANT INSERT, UPDATE ON Ligand TO 'ispyb_web';
-GRANT INSERT, UPDATE ON Ligand_has_PDB TO 'ispyb_web';
-GRANT INSERT, UPDATE ON BLSample_has_Ligand TO 'ispyb_web';
+GRANT INSERT, UPDATE, DELETE ON Ligand_has_PDB TO 'ispyb_web';
+GRANT INSERT, UPDATE, DELETE ON BLSample_has_Ligand TO 'ispyb_web';
 
 GRANT INSERT, UPDATE, DELETE ON UserGroup_has_Permission TO 'ispyb_web';
 GRANT INSERT, UPDATE, DELETE ON Permission TO 'ispyb_web';