Camera: Remove length check in case of 'getCameraIdList'

Camera providers must be able to report 0 camera devices.

Bug: 75234850
Test: vts-tradefed run vts --skip-all-system-status-check
--skip-preconditions --primary-abi-only --module
VtsHalCameraProviderV2_4Target -l INFO
Change-Id: Id3103ddcb4336fee01ee287c9e450b6f204a3da3

camera/provider/2.4/vts/functional/VtsHalCameraProviderV2_4TargetTest.cpp

@@ -1040,9 +1040,6 @@ TEST_F(CameraHidlTest, getCameraIdList) {
             ALOGI("Camera Id[%zu] is %s", i, idList[i].c_str());
         }
         ASSERT_EQ(Status::OK, status);
-        // This is true for internal camera provider.
-        // Not necessary hold for external cameras providers
-        ASSERT_GT(idList.size(), 0u);
     });
     ASSERT_TRUE(ret.isOk());
 }