DevTools: remove old Timeline front-end implementation

LayoutTests/inspector/timeline/timeline-load-event-expected.txt

Index: LayoutTests/inspector/timeline/timeline-load-event-expected.txt
diff --git a/LayoutTests/inspector/timeline/timeline-load-event-expected.txt b/LayoutTests/inspector/timeline/timeline-load-event-expected.txt
deleted file mode 100644
index bb53d759b89c8a7f631cc642454da9587fd5bf5c..0000000000000000000000000000000000000000
--- a/LayoutTests/inspector/timeline/timeline-load-event-expected.txt
+++ /dev/null
@@ -1,50 +0,0 @@
-Tests the load event.
-
-Page reloaded.
-Model records:
-MarkDOMContent Properties:
-{
-    data : {
-        isMainFrame : true
-    }
-    endTime : <number>
-    frameId : <string>
-    startTime : <number>
-    thread : <string>
-    type : "MarkDOMContent"
-}
-MarkLoad Properties:
-{
-    data : {
-        isMainFrame : true
-    }
-    endTime : <number>
-    frameId : <string>
-    startTime : <number>
-    thread : <string>
-    type : "MarkLoad"
-}
-Timestamp records:
-MarkDOMContent Properties:
-{
-    data : {
-        isMainFrame : true
-    }
-    endTime : <number>
-    frameId : <string>
-    startTime : <number>
-    thread : <string>
-    type : "MarkDOMContent"
-}
-MarkLoad Properties:
-{
-    data : {
-        isMainFrame : true
-    }
-    endTime : <number>
-    frameId : <string>
-    startTime : <number>
-    thread : <string>
-    type : "MarkLoad"
-}
-