refactor: remove core-ai test exports from brackets.js

Move AI test module injection to core-ai/main.js and relocate
ai-snapshot-test and ai-history-test to phoenix-pro/unit-tests.

Author: abose

src/brackets.js

@@ -296,8 +296,6 @@ define(function (require, exports, module) {
             SidebarTabs: require("view/SidebarTabs"),
             SidebarView: require("project/SidebarView"),
             WorkingSetView: require("project/WorkingSetView"),
-            AISnapshotStore: require("extensionsIntegrated/phoenix-pro/core-ai/AISnapshotStore"),
-            AIChatHistory: require("extensionsIntegrated/phoenix-pro/core-ai/AIChatHistory"),
             doneLoading: false
         };
 

test/UnitTestSuite.js

@@ -62,8 +62,6 @@ define(function (require, exports, module) {
     require("spec/KeybindingManager-integ-test");
     require("spec/LanguageManager-test");
     require("spec/LanguageManager-integ-test");
-    require("spec/ai-snapshot-test");
-    require("spec/ai-history-test");
     require("spec/LowLevelFileIO-test");
     require("spec/Metrics-test");
     require("spec/MultiRangeInlineEditor-test");