Remove unnecessary parentheses around assert. (#133)

This makes newer flake8 happy.

Signed-off-by: Chris Lalancette <clalancette@gmail.com>

src/python_qt_binding/binding_helper.py

@@ -134,7 +134,7 @@ def _register_binding_module(module_name, module):
 
 def _named_import(name):
     parts = name.split('.')
-    assert(len(parts) >= 2)
+    assert len(parts) >= 2
     module = builtins.__import__(name)
     for m in parts[1:]:
         module = module.__dict__[m]