Remove comments that are unneeded when code is more explicit

Author: berland

Lib/shutil.py

@@ -527,12 +527,9 @@ def _copytree(entries, src, dst, symlinks, ignore, copy_function,
                     else:
                         copy_function(srcobj, dstname)
             elif srcentry.is_dir():
-                # Will raise shutil.Error containing multiple exceptions gathered
-                # from recursion
                 copytree(srcobj, dstname, symlinks, ignore, copy_function,
                          ignore_dangling_symlinks, dirs_exist_ok)
             else:
-                # Can raise SpecialFileError or SameFileError
                 copy_function(srcobj, dstname)
         except ErrorGroup as err_group:
             errors.extend(err_group.args[0])