diff --git a/jedi/parser/__init__.py b/jedi/parser/__init__.py
index 12495722..95fd80dc 100644
--- a/jedi/parser/__init__.py
+++ b/jedi/parser/__init__.py
@@ -38,7 +38,7 @@ class Parser(object):
     :param top_module: Use this module as a parent instead of `self.module`.
     """
     def __init__(self, source, module_path=None, no_docstr=False,
-                 tokenizer=None, top_module=None, offset=0, is_fast=False):
+                 tokenizer=None, top_module=None, offset=0):
         self.no_docstr = no_docstr
 
         self.start_pos = self.end_pos = 1 + offset, 0
@@ -642,12 +642,6 @@ class PushBackTokenizer(object):
             return self._push_backs.pop(0)
 
         self.current = next(self._tokenizer)
-
-        def close():
-            if not self.first_stmt:
-                self.closed = True
-                raise common.MultiLevelStopIteration()
-        # ignore indents/comments
         return self.current
 
     @property
diff --git a/jedi/parser/fast.py b/jedi/parser/fast.py
index c5ff70ea..a8faad49 100644
--- a/jedi/parser/fast.py
+++ b/jedi/parser/fast.py
@@ -364,10 +364,10 @@ class FastParser(use_metaclass(CachedFastParser)):
             if nodes[index].code != code:
                 raise ValueError()
         except ValueError:
-            tokenizer = FastTokenizer(parser_code, line_offset, True)
+            tokenizer = FastTokenizer(parser_code, line_offset)
             p = Parser(parser_code, self.module_path, tokenizer=tokenizer,
                        top_module=self.module, no_docstr=no_docstr,
-                       is_fast=True, offset=line_offset)
+                       offset=line_offset)
             p.module.parent = self.module
         else:
             if nodes[index] != self.current_node:
@@ -390,13 +390,12 @@ class FastTokenizer(object):
     """
     Breaks when certain conditions are met, i.e. a new function or class opens.
     """
-    def __init__(self, source, line_offset=0, is_fast_parser=False):
+    def __init__(self, source, line_offset=0):
         self.source = source
         self.gen = source_tokens(source, line_offset)
         self.closed = False
 
         # fast parser options
-        self.is_fast_parser = is_fast_parser
         self.current = self.previous = TokenInfo(None, None, (0, 0), (0, 0))
         self.in_flow = False
         self.new_indent = False
@@ -428,11 +427,8 @@ class FastTokenizer(object):
                 self.closed = True
                 raise common.MultiLevelStopIteration()
         # ignore comments/ newlines
-        if self.is_fast_parser \
-                and self.previous[0] in (None, NEWLINE) \
-                and current[0] not in (COMMENT, NEWLINE):
+        if self.previous[0] in (None, NEWLINE) and current[0] not in (COMMENT, NEWLINE):
             # print c, tok_name[c[0]]
-
             tok = current[1]
             indent = current[2][1]
             if indent < self.parser_indent:  # -> dedent
diff --git a/jedi/parser/tokenize.py b/jedi/parser/tokenize.py
index 44cb22d0..03a66e29 100644
--- a/jedi/parser/tokenize.py
+++ b/jedi/parser/tokenize.py
@@ -148,6 +148,7 @@ tabsize = 8
 
 
 def source_tokens(source, line_offset=0):
+    """Generate tokens from a the source code (string)."""
     source = source + '\n'  # end with \n, because the parser needs it
     readline = StringIO(source).readline
     return generate_tokens(readline, line_offset)