refactor: we don't seem to need this 1->4 map in _multiline anymore

Author: nedbat

coverage/parser.py

@@ -198,12 +198,6 @@ def _raw_parse(self) -> None:
             byte_parser = ByteParser(self.text, filename=self.filename)
             self.raw_statements.update(byte_parser._find_statements())
 
-        # The first line of modules can lie and say 1 always, even if the first
-        # line of code is later. If so, map 1 to the actual first line of the
-        # module.
-        if env.PYBEHAVIOR.module_firstline_1 and self._multiline and self.raw_statements:
-            self._multiline[1] = min(self.raw_statements)
-
         self.excluded = self.first_lines(self.excluded)
 
         # AST lets us find classes, docstrings, and decorator-affected