Index: src/wp-content/themes/twentyfifteen/style.css
===================================================================
--- src/wp-content/themes/twentyfifteen/style.css	(revision 30709)
+++ src/wp-content/themes/twentyfifteen/style.css	(working copy)
@@ -3527,12 +3527,6 @@
 		font-size: 1.6rem;
 	}
 
-	.post-navigation .post-title {
-		font-size: 24px;
-		font-size: 2.4rem;
-		line-height: 1.1667;
-	}
-
 	.pagination .nav-links {
 		min-height: 3.3684em;
 	}