Drop DidStartHTTPServer to simplify object interactions.

tools/telemetry/telemetry/page/page_test.py

Index: tools/telemetry/telemetry/page/page_test.py
diff --git a/tools/telemetry/telemetry/page/page_test.py b/tools/telemetry/telemetry/page/page_test.py
index 55eef74b044d9ce9b659fea25b0efff2f5580f9d..871e71ee544657cefbdea4ed4a4c8b5b9bc34593 100644
--- a/tools/telemetry/telemetry/page/page_test.py
+++ b/tools/telemetry/telemetry/page/page_test.py
@@ -222,9 +222,6 @@ class PageTest(command_line.Command):
   def DidRunPageRepeats(self, page):
     """Override to do operations after each page is iterated over."""
 
-  def DidStartHTTPServer(self, tab):
-    """Override to do operations after the HTTP server is started."""
-
   def WillNavigateToPage(self, page, tab):
     """Override to do operations before the page is navigated, notably Telemetry
     will already have performed the following operations on the browser before