dt-bindings: tas2562: Remove tas2562 text file

Remove the tas2562 text file as the tas2562.yaml is now available.

Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20200817172151.26564-1-dmurphy@ti.com


Signed-off-by: Mark Brown <broonie@kernel.org>