meta-phosphor: ipmid: remove POWER_READING_SENSOR

/usr/share/ipmi-providers/power_reading.json is the ipmid default
anyway, so there isn't any point in setting it explicitly.

Change-Id: I3c9ccc46cacee01ec910478d9f1c041638a0558b
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb b/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
index 0654cfe..1438eaa 100644
--- a/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
+++ b/recipes-phosphor/ipmi/phosphor-ipmi-host_git.bb
@@ -76,7 +76,6 @@
         INVSENSOR_YAML_GEN=${STAGING_DIR_NATIVE}${sensor_datadir}/invsensor.yaml \
         FRU_YAML_GEN=${STAGING_DIR_NATIVE}${config_datadir}/fru_config.yaml \
         ENTITY_YAML_GEN=${STAGING_DIR_NATIVE}${sensor_datadir}/entity.yaml \
-        POWER_READING_SENSOR=${datadir}/ipmi-providers/power_reading.json\
         "
 
 S = "${WORKDIR}/git"