fix(cli): drop duplicate object properties breaking the main build (#10022)

#9998 re-added getSessionDisplayName and getCurrentCustomTitle to the
session-swap telemetry fakes, which already declared both. TS1117 fails
tsc --build, breaking every workflow that runs npm run build on main.

Author: yiliang114

packages/cli/src/ui/hooks/session-swap-telemetry.test.ts

@@ -194,7 +194,6 @@ function makeFakeEnv() {
     }),
     renameSession: vi.fn().mockResolvedValue(true),
     findSessionTitlesByPrefix: vi.fn().mockResolvedValue([]),
-    getSessionDisplayName: vi.fn().mockResolvedValue(undefined),
   };
 
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
@@ -208,7 +207,6 @@ function makeFakeEnv() {
       return currentSessionId;
     },
     getChatRecordingService: () => ({
-      getCurrentCustomTitle: () => undefined,
       finalize: vi.fn(),
       flush: vi.fn().mockResolvedValue(undefined),
       rebuildTurnBoundaries: vi.fn(),