pmb.install: remove QEMU emulation binary from device rootfs
At the moment there is a weird (unusable) qemu-<arch>-static
binary
installed in /usr/bin/ on the device rootfs. This binary is only used
by pmbootstrap for emulation during the installation.
It is compiled for the host arch instead of the device arch. Therefore, it is not usable on the device in any way:
samsung-a5ulte:~$ qemu-aarch64-static
/usr/bin/qemu-aarch64-static: line 1: syntax error: unexpected end of file
Remove it when copying the rootfs to the block device.