chore: remove unnecessary backwards compat re-export

This PR was never merged, so no need for backwards compatibility.
Import formatBytes directly from its source file.

Author: hannesrudolph

src/utils/__tests__/task-storage-size.spec.ts

@@ -1,4 +1,5 @@
-import { calculateTaskStorageSize, formatBytes } from "../task-storage-size"
+import { calculateTaskStorageSize } from "../task-storage-size"
+import { formatBytes } from "../formatBytes"
 
 // Mock storage to avoid VS Code config access during tests
 vi.mock("../storage", () => ({
@@ -12,7 +13,6 @@ vi.mock("fs/promises", () => ({
 	readdir: (...args: unknown[]) => mockReaddir(...args),
 }))
 
-// formatBytes is still exported for backwards compatibility but not used by calculateTaskStorageSize
 describe("formatBytes", () => {
 	it("should format 0 bytes", () => {
 		expect(formatBytes(0)).toBe("0 B")

src/utils/task-storage-size.ts

@@ -2,7 +2,6 @@ import * as path from "path"
 import * as fs from "fs/promises"
 
 import { getStorageBasePath } from "./storage"
-import { formatBytes } from "./formatBytes"
 
 /**
  * Result of counting task history items.
@@ -14,9 +13,6 @@ export interface TaskStorageSizeResult {
 	taskCount: number
 }
 
-// Re-export for backwards compatibility with existing imports/tests.
-export { formatBytes }
-
 /**
  * Counts the number of task directories in task history storage.
  *