Move the parse function to the grammar.

test/test_parser.py

@@ -114,7 +114,7 @@ def test_param_splitting():
     def check(src, result):
         # Python 2 tuple params should be ignored for now.
         grammar = load_python_grammar('%s.%s' % sys.version_info[:2])
-        m = parse(src, grammar=grammar)
+        m = grammar.parse(src)
         if py_version >= 30:
             assert not list(m.iter_funcdefs())
         else:

test/test_pgen2.py

@@ -10,7 +10,6 @@ from textwrap import dedent
 
 from parso._compatibility import py_version
 from parso import load_python_grammar
-from parso.python import parse as _parse
 from parso import ParserSyntaxError
 import pytest
 
@@ -18,7 +17,7 @@ import pytest
 def parse(code, version='3.4'):
     code = dedent(code) + "\n\n"
     grammar = load_python_grammar(version=version)
-    return _parse(code, grammar=grammar, error_recovery=False)
+    return grammar.parse(code, error_recovery=False)
 
 
 def test_formfeed():