Fix linting for Pylint 2.0 (#1833)

Closes #1832

.pylintrc

@@ -50,3 +50,9 @@ disable=
     wrong-import-order,
     ungrouped-imports,
     unused-argument,
+    useless-object-inheritance,
+    useless-import-alias,
+    comparison-with-callable,
+    try-except-raise,
+    # TODO: use dict comprehensions once we drop Python 2.6 support. 
+    consider-using-dict-comprehension,

gunicorn/app/wsgiapp.py

@@ -30,7 +30,7 @@ class WSGIApplication(Application):
             from .pasterapp import paste_config
             return paste_config(self.cfg, self.cfgurl, self.relpath)
 
-        if len(args) < 1:
+        if not args:
             parser.error("No application module specified.")
 
         self.cfg.set("default_proc_name", args[0])

gunicorn/util.py

@@ -51,7 +51,7 @@ try:
         setproctitle("gunicorn: %s" % title)
 except ImportError:
     def _setproctitle(title):
-        return
+        pass
 
 
 try: