revert "meson: support custom led yaml path"

This reverts commit fcfb2b62c5bc74ce42500c5d3d421860c8a74425.

That commit is no longer needed after we switch to handle the copying
of led.yaml in meta-phosphor.

Signed-off-by: Seires Li <seiresli@pcpartner.com>
Change-Id: I20526480e28ed29e22a2e8982c538b58b85ee911
2 files changed