Cleanup: move public doc-strings into headers for 'python'

source/blender/python/mathutils/mathutils_Matrix.c

@@ -3382,9 +3382,6 @@ PyObject *Matrix_CreatePyObject_cb(
   return (PyObject *)self;
 }
 
-/**
- * \param mat: Initialized matrix value to use in-place, allocated with #PyMem_Malloc
- */
 PyObject *Matrix_CreatePyObject_alloc(float *mat,
                                       const ushort num_col,
                                       const ushort num_row,