Remove redundant parameter (#1562)

...gs/fcos/fcos_mstrain_640_800_r101_caffe_fpn_gn_2x_4gpu.py

configs/fcos/fcos_mstrain_640_800_x101_64x4d_fpn_gn_2x.py

configs/fcos/fcos_r50_caffe_fpn_gn_1x_4gpu.py

configs/foveabox/fovea_align_gn_ms_r101_fpn_4gpu_2x.py

configs/foveabox/fovea_align_gn_ms_r50_fpn_4gpu_2x.py

configs/foveabox/fovea_align_gn_r101_fpn_4gpu_2x.py

configs/foveabox/fovea_align_gn_r50_fpn_4gpu_2x.py

configs/foveabox/fovea_r50_fpn_4gpu_1x.py

configs/fp16/retinanet_r50_fpn_fp16_1x.py

configs/ghm/retinanet_ghm_r50_fpn_1x.py

configs/guided_anchoring/ga_retinanet_r50_caffe_fpn_1x.py

configs/guided_anchoring/ga_retinanet_x101_32x4d_fpn_1x.py

configs/hrnet/faster_rcnn_hrnetv2p_w18_1x.py

configs/hrnet/faster_rcnn_hrnetv2p_w32_1x.py

configs/hrnet/faster_rcnn_hrnetv2p_w40_1x.py

configs/hrnet/fcos_hrnetv2p_w32_gn_1x_4gpu.py

configs/htc/htc_x101_32x4d_fpn_20e_16gpu.py

configs/libra_rcnn/libra_retinanet_r50_fpn_1x.py

configs/reppoints/bbox_r50_grid_center_fpn_1x.py

configs/reppoints/bbox_r50_grid_fpn_1x.py