Delete redundant Chinese comments (#275)

fastdeploy/vision/visualize/ocr.cc

@@ -24,11 +24,9 @@ cv::Mat Visualize::VisOcr(const cv::Mat &im, const OCRResult &ocr_result) {
   auto vis_im = im.clone();
 
   for (int n = 0; n < ocr_result.boxes.size(); n++) {
-    //遍历每一个盒子
     cv::Point rook_points[4];
 
     for (int m = 0; m < 4; m++) {
-      //对每一个盒子 array<float,8>
       rook_points[m] = cv::Point(int(ocr_result.boxes[n][m * 2]),
                                  int(ocr_result.boxes[n][m * 2 + 1]));
     }