Remove Python 2 compatibility (#1348)

* Remove Python 2 compatibility

* remove 2/3 shims in pygments.util
* update setup.py metadata

* Remove unneeded object inheritance.

* Remove unneeded future imports.

1 files changed, 3 insertions, 3 deletions

diff --git a/pygments/formatter.py b/pygments/formatter.py
index f09f6e3c..60531523 100644
--- a/pygments/formatter.py
+++ b/pygments/formatter.py
@@ -11,19 +11,19 @@
 
 import codecs
 
-from pygments.util import get_bool_opt, string_types
+from pygments.util import get_bool_opt
 from pygments.styles import get_style_by_name
 
 __all__ = ['Formatter']
 
 
 def _lookup_style(style):
-    if isinstance(style, string_types):
+    if isinstance(style, str):
         return get_style_by_name(style)
     return style
 
 
-class Formatter(object):
+class Formatter:
     """
     Converts a token stream to text.