fix feat_channel and polish voc config (#2765)

configs/ppyolo/_base_/ppyolo_r18vd.yml

@@ -19,7 +19,6 @@ ResNet:
   norm_decay: 0.
 
 PPYOLOFPN:
-  feat_channels: [512, 512]
   drop_block: true
   block_size: 3
   keep_prob: 0.9

configs/ppyolo/ppyolo_r50vd_dcn_voc.yml

@@ -10,14 +10,6 @@ snapshot_epoch: 83
 weights: output/ppyolo_r50vd_dcn_voc/model_final
 
 TrainReader:
-  batch_transforms:
-    - BatchRandomResize: {target_size: [320, 352, 384, 416, 448, 480, 512, 544, 576, 608], random_size: True, random_interp: True, keep_ratio: False}
-    - NormalizeBox: {}
-    - PadBox: {num_max_boxes: 50}
-    - BboxXYXY2XYWH: {}
-    - NormalizeImage: {mean: [0.485, 0.456, 0.406], std: [0.229, 0.224, 0.225], is_scale: True}
-    - Permute: {}
-    - Gt2YoloTarget: {anchor_masks: [[6, 7, 8], [3, 4, 5], [0, 1, 2]], anchors: [[10, 13], [16, 30], [33, 23], [30, 61], [62, 45], [59, 119], [116, 90], [156, 198], [373, 326]], downsample_ratios: [32, 16, 8], num_classes: 20}
   mixup_epoch: 350
   batch_size: 12