meson: remove oe-sdk support

Very few of our projects have this extra code and it doesn't seem
very useful considering we have both meson-subproject support and
developers can use devtool.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I41f8ba99600c04596b4fc37cc5b0ec00976d1e24
3 files changed