arm/qemuarm64-secureboot: removed unused -dev kernel

The change of the qemuarm64-secureboot kernel to the generic one didn't
remove the no longer necessary kernel.

Change-Id: Id6d49084e2bee0956b986958a5d990f9ec41ea5a
Signed-off-by: Jon Mason <jon.mason@arm.com>

meta-arm/recipes-kernel/linux/linux-yocto-dev.bbappend

@@ -1,4 +0,0 @@
-FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
-
-SRC_URI_append_qemuarm64-secureboot = " file://tee.cfg"
-

meta-arm/recipes-kernel/linux/linux-yocto-dev/tee.cfg

@@ -1,4 +0,0 @@
-CONFIG_HW_RANDOM_OPTEE=m
-CONFIG_TEE=m
-CONFIG_OPTEE=m
-CONFIG_OPTEE_SHM_NUM_PRIV_PAGES=10