Remove 'relevant application caches (#318)

Author: noamr

index.html

@@ -260,10 +260,8 @@ <h3>
           "PERFORMANCE-TIMELINE-2#performance-timeline">Performance
           Timeline</a>, unless excluded from the timeline as part of the
           [=fetch|fetching process=]. Resources that are retrieved from
-          <a data-cite="HTML#relevant-application-cache">relevant application
-          caches</a> or local resources are included as
-          <a>PerformanceResourceTiming</a> objects in the <a data-cite=
-          "PERFORMANCE-TIMELINE-2#performance-timeline">Performance
+          HTTP cache are included as <a>PerformanceResourceTiming</a> objects in the
+          <a data-cite="PERFORMANCE-TIMELINE-2#performance-timeline">Performance
           Timeline</a>. Resources for which the [=fetch=] was initiated, but
           was later aborted (e.g. due to a network error) are included as
           <a>PerformanceResourceTiming</a> objects in the <a data-cite=