Do not use Sphinx text roles in the NEWS file

Gallaecio · Gallaecio · commit c9901d25043d · 2019-08-09T13:23:46.000+02:00
The NEWS file is included as part of the long description of the
package, and the Python Package Index does not allow Sphinx text
roles.
diff --git a/NEWS b/NEWS
@@ -6,8 +6,7 @@ History
 1.5.2 (2019-08-09)
 ~~~~~~~~~~~~~~~~~~
 
-* :meth:`Selector.remove_namespaces <parsel.selector.Selector.remove_namespaces>`
-  received a significant performance improvement
+* ``Selector.remove_namespaces`` received a significant performance improvement
 * The value of ``data`` within the printable representation of a selector
   (``repr(selector)``) now ends in ``...`` when truncated, to make the
   truncation obvious.
