Devtools: get rid of ProjectWillReset event, introduce ProjectRemoved instead of it

Source/devtools/front_end/sdk/SnippetStorage.js

Index: Source/devtools/front_end/sdk/SnippetStorage.js
diff --git a/Source/devtools/front_end/sdk/SnippetStorage.js b/Source/devtools/front_end/sdk/SnippetStorage.js
index d1cbc0655c0bd23d3423698e20a9282ab37f934b..93acff5ce9009d53f92f57c97e846b665c6e865c 100644
--- a/Source/devtools/front_end/sdk/SnippetStorage.js
+++ b/Source/devtools/front_end/sdk/SnippetStorage.js
@@ -128,13 +128,6 @@ WebInspector.SnippetStorage.prototype = {
         this._snippets[snippet.id] = snippet;
     },
 
-    reset: function()
-    {
-        this._lastSnippetIdentifierSetting.set(0);
-        this._snippetsSetting.set([]);
-        this._snippets = {};
-    },
-
     __proto__: WebInspector.Object.prototype
 }