dt-bindings: display: simple-framebuffer: Drop Bartlomiej Zolnierkiewicz

Bartlomiej's Samsung email address is not working since around last
year and there was no follow up patch take over of the drivers, so drop
the email from maintainers.

Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220808101526.46556-3-krzysztof.kozlowski@linaro.org