dt-bindings: vendor-prefixes: fix bad merge

Remove the vendor-prefix reject file which was accidentally added when
merging the gnss sirfstar binding. The wi2wi prefix had already been
added by commit a593bff8 ("dt-bindings: define vendor prefix for
Wi2Wi, Inc.").

Fixes: 176193b7 ("dt-bindings: gnss: add sirfstar binding")
Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>