test: more t1.9 minor edits (gcli_adapter patches, comments)

Drop the remaining _update_gcli_adapter monkeypatches from
test_ai_loop_regressions_20260614 (3 sites), test_live_gui_integration_v2
(2 sites), and the gemini_cli_adapter comment references in
tests/test_ai_client_tool_loop_send_func.py, test_lazymodule_filedialog_fallback.py,
and mock_concurrent_mma.py.

tests/test_lazymodule_filedialog_fallback.py

@@ -7,7 +7,7 @@ the `tkinter.filedialog` sub-module fails to load. The original `_LazyModule`
 in src/gui_2.py used `getattr(tkinter, 'filedialog')` which raises a
 confusing AttributeError at the call site. With 14 call sites in
 render_projects_panel, render_workspace_settings_hub, render_fonts_panel,
-and render_gemini_cli_settings, this AttributeError spammed the GUI's
+this AttributeError spammed the GUI's
 stderr at 60fps whenever the Project Settings window was open.
 
 The fix must make `_LazyModule` fall back to a stub that mimics