conf: am437xx-evm: Remove non-existent dtb* from 5.10
conf: am437xx-evm: Remove non-existent dtb* from 5.10

Remove the non-existent dtb* , as they are not currently present on
ti-linux-5.10.y.

-    am437x-gp-evm-hdmi.dtb
-    am43x-epos-evm-hdmi.dtb

Signed-off-by: Praneeth Bajjuri <5cbfdb29322859ed5c637fdb11a8f23fddd8e511@ti.com>

rcn-ee/meta-ti,rcn-ee/meta-ti,rcn-ee/meta-ti,rcn-ee/meta-ti