Change how hwmon.pl is invoked for MRW systems

This minor tweak removes the need for MRW using systems
to append the phosphor-hwmon recipe in their layer.

Change-Id: I3d9dcfff452e26d191df37ae7d759c6c2c3f2cd4
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-witherspoon/recipes-phosphor/sensors/phosphor-hwmon%.bbappend b/meta-witherspoon/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
deleted file mode 100644
index 9b01712..0000000
--- a/meta-witherspoon/recipes-phosphor/sensors/phosphor-hwmon%.bbappend
+++ /dev/null
@@ -1 +0,0 @@
-inherit phosphor-hwmon-mrw