Remove UML header export

No need for UML to export headers for userspace to build against.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/include/asm-um/Kbuild b/include/asm-um/Kbuild
deleted file mode 100644
index c68e168..0000000
--- a/include/asm-um/Kbuild
+++ /dev/null
@@ -1 +0,0 @@
-include include/asm-generic/Kbuild.asm