Revert of "Speculatively launch Service Workers on mouse/touch events."

components/network_hints/renderer/prescient_networking_dispatcher.h

Index: components/network_hints/renderer/prescient_networking_dispatcher.h
diff --git a/components/network_hints/renderer/prescient_networking_dispatcher.h b/components/network_hints/renderer/prescient_networking_dispatcher.h
index c7f68ec437427ac1bda75daef3cf5f5861caf2cd..a4e7ecd88028a6a5c1a88a1d14311236a0ee3d3c 100644
--- a/components/network_hints/renderer/prescient_networking_dispatcher.h
+++ b/components/network_hints/renderer/prescient_networking_dispatcher.h
@@ -10,10 +10,6 @@
 #include "components/network_hints/renderer/renderer_preconnect.h"
 #include "third_party/WebKit/public/platform/WebPrescientNetworking.h"
 
-namespace blink {
-enum class WebNavigationHintType;
-}
-
 namespace network_hints {
 
 // The main entry point from blink for sending DNS prefetch requests to the
@@ -26,8 +22,6 @@ class PrescientNetworkingDispatcher : public blink::WebPrescientNetworking {
   void prefetchDNS(const blink::WebString& hostname) override;
   void preconnect(const blink::WebURL& url,
                   const bool allow_credentials) override;
-  void sendNavigationHint(const blink::WebURL& url,
-                          blink::WebNavigationHintType type) override;
 
  private:
   network_hints::RendererDnsPrefetch dns_prefetch_;