remove duplicate code

Author: Gerit Wagner

search_query/ebscohost/parser.py

@@ -458,10 +458,6 @@ def parse(self) -> Query:
         self.linter.validate_tokens()
         self.linter.check_status()
 
-        self.tokenize_list()
-        self.linter.validate_tokens()
-        self.linter.check_status()
-
         query_str, offset = self.build_query_str()
 
         query_parser = EBSCOParser(