Some lines sould be removed in the cpp code

[deeperlearner]

My reference of skimage umeyama code is the following:
https://github.com/scikit-image/scikit-image/blob/main/skimage/transform/_geometric.py#L105

I think there are some confusing lines that should be corrected.
Line 101: T.rowRange(0, dim).colRange(0, dim) = U * V; This line should be removed.
Line 104: cv::Mat B = cv::Mat::zeros(3, 3, CV_8UC1);
Line 105: cv::Mat C = B.diag(0); What is the function of C? It is not mentioned later.
Line 112: cv::Mat res = U * twp; // U; res is not used.
Line 101, 104, 105, 112 should be removed.