[FIX] update docs and configs about openvino ssd deployment (#175)

* add openvino static config for docs' ssd deploy

* fix docs of openvino.md

* fix ssd openvino deployment

* rename openvino config

* remove some files

configs/mmdet/_base_/base_openvino_dynamic-300x300.py

@@ -0,0 +1,6 @@
+_base_ = ['./base_dynamic.py', '../../_base_/backends/openvino.py']
+
+onnx_config = dict(input_shape=None)
+
+backend_config = dict(
+    model_inputs=[dict(opt_shapes=dict(input=[1, 3, 300, 300]))])

configs/mmdet/detection/detection_openvino_dynamic-300x300.py

@@ -0,0 +1 @@
+_base_ = ['../_base_/base_openvino_dynamic.py']

docs/en/backends/openvino.md

@@ -27,7 +27,7 @@ sudo apt-get install libpython3.7
 Example:
 ```bash
 python tools/deploy.py \
-    configs/mmdet/detection/detection_openvino_dynamic.py \
+    configs/mmdet/detection/detection_openvino_static-300x300.py \
     /mmdetection_dir/mmdetection/configs/ssd/ssd300_coco.py \
     /tmp/snapshots/ssd300_coco_20210803_015428-d231a06e.pth \
     tests/data/tiger.jpeg \