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

Source/devtools/front_end/sdk/ScriptSnippetModel.js

Index: Source/devtools/front_end/sdk/ScriptSnippetModel.js
diff --git a/Source/devtools/front_end/sdk/ScriptSnippetModel.js b/Source/devtools/front_end/sdk/ScriptSnippetModel.js
index ba3f03f388fcc1a89ae389fa8548e3b00c7509d3..248ded46803a8bc8f3325f37958ccae53507c6ef 100644
--- a/Source/devtools/front_end/sdk/ScriptSnippetModel.js
+++ b/Source/devtools/front_end/sdk/ScriptSnippetModel.js
@@ -49,7 +49,7 @@ WebInspector.ScriptSnippetModel = function(workspace)
     this._projectId = WebInspector.projectTypes.Snippets + ":";
     this._projectDelegate = new WebInspector.SnippetsProjectDelegate(workspace, this, this._projectId);
     this._project = this._workspace.project(this._projectId);
-    this.reset();
+    this._loadSnippets();
     WebInspector.targetManager.observeTargets(this);
 }
 
@@ -371,16 +371,6 @@ WebInspector.ScriptSnippetModel.prototype = {
         return snippetId;
     },
 
-    reset: function()
-    {
-        this._mappingForTarget.values().forEach(function(mapping){mapping._reset()});
-        /** @type {!Object.<string, !WebInspector.UISourceCode>} */
-        this._uiSourceCodeForSnippetId = {};
-        this._snippetIdForUISourceCode = new Map();
-        this._projectDelegate.reset();
-        this._loadSnippets();
-    },
-
     __proto__: WebInspector.Object.prototype
 }