remove unused code (matterport#1227)

Remove unused code

Author: yanfengliu

mrcnn/model.py

@@ -526,7 +526,6 @@ def detection_targets_graph(proposals, gt_class_ids, gt_boxes, gt_masks, config)
     crowd_ix = tf.where(gt_class_ids < 0)[:, 0]
     non_crowd_ix = tf.where(gt_class_ids > 0)[:, 0]
     crowd_boxes = tf.gather(gt_boxes, crowd_ix)
-    crowd_masks = tf.gather(gt_masks, crowd_ix, axis=2)
     gt_class_ids = tf.gather(gt_class_ids, non_crowd_ix)
     gt_boxes = tf.gather(gt_boxes, non_crowd_ix)
     gt_masks = tf.gather(gt_masks, non_crowd_ix, axis=2)

mrcnn/visualize.py

@@ -140,7 +140,6 @@ def display_instances(image, boxes, masks, class_ids, class_names,
             class_id = class_ids[i]
             score = scores[i] if scores is not None else None
             label = class_names[class_id]
-            x = random.randint(x1, (x1 + x2) // 2)
             caption = "{} {:.3f}".format(label, score) if score else label
         else:
             caption = captions[i]
@@ -436,7 +435,6 @@ def draw_boxes(image, boxes=None, refined_boxes=None,
             # If there are refined boxes, display captions on them
             if refined_boxes is not None:
                 y1, x1, y2, x2 = ry1, rx1, ry2, rx2
-            x = random.randint(x1, (x1 + x2) // 2)
             ax.text(x1, y1, caption, size=11, verticalalignment='top',
                     color='w', backgroundcolor="none",
                     bbox={'facecolor': color, 'alpha': 0.5,