phosphor: distro: remove meta-poky content

There are two items in the phosphor distro configuration that originate
in the meta-poky layer.  If we can remove these there isn't any need
to include meta-poky in the build layer configuration.

poky-work-exclude: This file is empty; removing is a noop.
poky-sanity.bbclass: This is for sanity checking of the Poky reference
  distro, and not the OpenBMC distro (phosphor).

(From meta-phosphor rev: e34a2bcd8a871769c64bcae4e46553103dc952c0)

Change-Id: Idd203805dd16a21314d59eedb3db91a0d193c8bf
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/conf/distro/include/phosphor-base.inc b/meta-phosphor/conf/distro/include/phosphor-base.inc
index abb4178..6bfef37 100644
--- a/meta-phosphor/conf/distro/include/phosphor-base.inc
+++ b/meta-phosphor/conf/distro/include/phosphor-base.inc
@@ -64,9 +64,6 @@
 
 OELAYOUT_ABI = "12"
 
-# add poky sanity bbclass
-INHERIT += "poky-sanity"
-
 # QA check settings - a little stricter than the OE-Core defaults
 WARN_TO_ERROR_QA = "already-stripped compile-host-path install-host-path \
                     installed-vs-shipped ldflags pn-overrides rpaths staticdev \
@@ -74,7 +71,6 @@
 WARN_QA_remove = "${WARN_TO_ERROR_QA}"
 ERROR_QA_append = " ${WARN_TO_ERROR_QA}"
 
-require conf/distro/include/poky-world-exclude.inc
 require conf/distro/include/no-static-libs.inc
 
 DISTRO = "openbmc-phosphor"