Remove obsolete epapr-1.1.adoc file
Remove obsolete epapr-1.1.adoc file

epapr-1.1.adoc was and ASCIIdoc import of the original ePAPR text.
However, this project has since switched to reStructuredText markup, and
all of the content is not transfered over to the files in source/*.rst.
epapr-1.1.adoc is no longer needed.

Signed-off-by: Grant Likely <9069e6f5a2b566e2674a0ba1e2bf39c12c195fad@linaro.org>

devicetree-org/devicetree-specification,kvekaria/devicetree-specification