Cleanup: unused vars, imports

tests/python/bl_run_operators.py

@@ -141,7 +141,7 @@ def reset_blend():
 
     if USE_RANDOM_SCREEN:
         import random
-        for i in range(random.randint(0, len(bpy.data.screens))):
+        for _ in range(random.randint(0, len(bpy.data.screens))):
             bpy.ops.screen.delete()
         print("Scree IS", bpy.context.screen)
 
@@ -237,7 +237,7 @@ if USE_ATTRSET:
             seq = getattr(bpy.data, attr)
             if seq.__class__.__name__ == 'bpy_prop_collection':
                 for id_data in seq:
-                    for val, prop, tp in id_walk(id_data, bpy.data):
+                    for val, prop, _tp in id_walk(id_data, bpy.data):
                         # print(id_data)
                         for val_rnd in _random_values:
                             try: