Inspector: replace generic discardAgents logic with explicit call to discard a listener.

Source/core/inspector/InspectorBaseAgent.cpp

Index: Source/core/inspector/InspectorBaseAgent.cpp
diff --git a/Source/core/inspector/InspectorBaseAgent.cpp b/Source/core/inspector/InspectorBaseAgent.cpp
index 950e4224c46a140a113bfa47704593aecfdcd2c2..a40f74d101834431d57f72ca1c108ef52cdf7d0d 100644
--- a/Source/core/inspector/InspectorBaseAgent.cpp
+++ b/Source/core/inspector/InspectorBaseAgent.cpp
@@ -84,11 +84,5 @@ void InspectorAgentRegistry::registerInDispatcher(InspectorBackendDispatcher* di
         m_agents[i]->registerInDispatcher(dispatcher);
 }
 
-void InspectorAgentRegistry::discardAgents()
-{
-    for (size_t i = 0; i < m_agents.size(); i++)
-        m_agents[i]->discardAgent();
-}
-
 } // namespace WebCore