Remove object inheritance in class GitChart

Author: flashcode

Makefile

@@ -28,4 +28,4 @@ flake8:
 	flake8 . --count --exit-zero --max-complexity=10 --statistics
 
 pylint:
-	pylint --disable=R0205 gitchart.py
+	pylint gitchart.py

gitchart.py

@@ -57,7 +57,7 @@
 
 
 # pylint: disable=too-few-public-methods,too-many-instance-attributes
-class GitChart(object):
+class GitChart:
     """Generate a git stat chart."""
 
     charts = {