Cleanup: remove redundant braces from assert & raise

autopep8 v1.7 added a space after assert & raise,
remove the braces as they aren't needed.

tests/python/bl_mesh_modifiers.py

@@ -55,8 +55,8 @@ def render_gl(context, filepath, shade):
 
 def render_gl_all_modes(context, obj, filepath=""):
 
-    assert(obj is not None)
-    assert(filepath != "")
+    assert obj is not None
+    assert filepath != ""
 
     scene = context.scene
 
@@ -91,7 +91,7 @@ def render_gl_all_modes(context, obj, filepath=""):
 
     render_gl(context, filepath + "_wp_wire", shade='WIREFRAME')
 
-    assert(1)
+    assert 1
 
     bpy.ops.object.mode_set(mode='OBJECT', toggle=False)