trousers: use delete ctor instead of DISALLOW_*

The deprecated macros will be removed from base/macros.h from libchrome
r938828.

BUG=b:211560276
TEST=FEATURES=test emerge-veyron_rialto trousers

Change-Id: Iabed2ee3199189191322b193f8cf41071e839393
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/trousers/+/3461260
Tested-by: Grace Cham <[email protected]>
Reviewed-by: Andrey Pronin <[email protected]>
Commit-Queue: Grace Cham <[email protected]>
1 file changed