Remove overlay of device-tree-from-bd

It's better to fix it in Techlab layer.

recipes-bsp/device-tree-from-bd/device-tree-from-bd.bbappend

-
-# Do not try to install variants if FPGA manager is not used
-do_install() {
-    install -d ${D}/opt/mtca-tech-lab/dt
-    install -m 0644 ${B}/dts_app/${DT_FROM_BD_DTS_FILENAME} ${D}/opt/mtca-tech-lab/dt/
-    if [ ${FPGA_MNGR_RECONFIG_ENABLE} = "1" ]; then
-        install -m 0644 ${B}/dts_app/app_from_bd_*.dts ${D}/opt/mtca-tech-lab/dt/
-    fi
-}