Documentation: Fix text for railtype_disable_realistic_braking

docs/newgrf-additions.html

@@ -232,8 +232,7 @@
 	</p>
 	<p>This is indicated by the feature name: <font face="monospace">action0_railtype_restricted_signals</font>, version 1</p>
 	<h4 id="railtype_disable_realistic_braking">Disable use of realistic braking with this rail type (mappable property: railtype_disable_realistic_braking)</h4>
-	<p>This applies to <a href="https://newgrf-specs.tt-wiki.net/wiki/Action3/Railtypes#Signal_sprites_.280B.29">Action 2/3 - Railtype custom signal sprites</a>.<br />
-	When this property is set realistic braking is disabled for trains of this railtype even when realistic braking is otherwise in effect.<br />
+	<p>When this property is set realistic braking is disabled for trains of this railtype even when realistic braking is otherwise in effect.<br />
 	The property length is 1 byte. 0 is realistic braking is not disabled for this railtype. 1 is disable realistic braking for this railtype.
 	</p>
 	<p>This is indicated by the feature name: <font face="monospace">action0_railtype_disable_realistic_braking</font>, version 1</p>