fix(fs#unlink): remove timeout

This is not an `O(1)` operation.

@xen-orchestra/fs/src/abstract.js

@@ -368,7 +368,7 @@ export default class RemoteHandlerAbstract {
       ignoreErrors.call(this._unlink(checksumFile(file)))
     }
 
-    await timeout.call(this._unlink(file).catch(ignoreEnoent), this._timeout)
+    await this._unlink(file).catch(ignoreEnoent)
   }
 
   async writeFile(

@xen-orchestra/fs/src/abstract.spec.js

@@ -111,15 +111,3 @@ describe('rmdir()', () => {
     await expect(promise).rejects.toThrowError(TimeoutError)
   })
 })
-
-describe('unlink()', () => {
-  it(`throws in case of timeout`, async () => {
-    const testHandler = new TestHandler({
-      unlink: () => new Promise(() => {}),
-    })
-
-    const promise = testHandler.unlink('')
-    jest.advanceTimersByTime(TIMEOUT)
-    await expect(promise).rejects.toThrowError(TimeoutError)
-  })
-})