org-element-at-point: Fix breakage when called at the end of section

* lisp/org-element.el (org-element-at-point): Do no unconditionally
return first matching cached element when point is within blank lines
after section element and CACHED-ONLY is non-nil.

Fixes https://list.orgmode.org/smbl59$qjm$1@ciao.gmane.io/T/#u

lisp/org-element.el

@@ -7511,9 +7511,6 @@ element ending there."
                                  (and (org-element-property :contents-begin element)
                                       (>= pom (org-element-property :begin element))
                                       (< pom (org-element-property :contents-begin element)))
-                                 (and (org-element-property :contents-end element)
-                                      (< pom (org-element-property :end element))
-                                      (>= pom (org-element-property :contents-end element)))
                                  (and (not (org-element-property :contents-end element))
                                       (>= pom (org-element-property :begin element))
                                       (< pom (org-element-property :end element)))))))