adt-installer: No need to mark as nostamp

With the modern checksum infrastructure, this is no longer needed
(much in the same way images no longer need this).

(From OE-Core rev: db0ffc5a109c0b5e91f1fc67ac679bdc558c251f)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/installer/adt-installer_1.0.bb

@@ -82,7 +82,6 @@ fakeroot do_populate_adt () {
 	cp ${WORKDIR}/adt_installer.tar.bz2 ${ADT_DEPLOY}
 }
 
-do_populate_adt[nostamp] = "1"
 do_configure[noexec] = "1"
 do_compile[noexec] = "1"
 do_package[noexec] = "1"