lisp/org-colview.el (org-columns): Avoid calling expensive `move-marker'

Just rely on garbage collector to do the right thing.  `move-marker'
significantly slows down column creation.   More than GC.

lisp/org-colview.el

@@ -897,7 +897,6 @@ When COLUMNS-FMT-STRING is non-nil, use it as the column format."
                 (setq truncate-lines t))
 	    (dolist (entry cache)
 	      (goto-char (car entry))
-              (move-marker (car entry) nil)
 	      (org-columns--display-here (cdr entry)))))))))
 
 (defun org-columns-new (&optional spec &rest attributes)