Remove an occurance of the complicated parser creation.

jedi/parser/__init__.py

@@ -1,2 +1,7 @@
 from jedi.parser.parser import Parser, ParserWithRecovery, ParseError
 from jedi.parser.pgen2.pgen import generate_grammar
+
+
+def parse(grammar, code):
+    raise NotImplementedError
+    Parser(grammar, code)