meta-phosphor: remove unused variables

These variables are unused; remove the dead metadata.

Change-Id: I17d0282277a0231a264773d8bac9afeef69ec8b4
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
diff --git a/meta-phosphor/conf/distro/include/phosphor-defaults.inc b/meta-phosphor/conf/distro/include/phosphor-defaults.inc
index a49eb7c..f53e92c 100644
--- a/meta-phosphor/conf/distro/include/phosphor-defaults.inc
+++ b/meta-phosphor/conf/distro/include/phosphor-defaults.inc
@@ -1,12 +1,7 @@
 OBMC_BMC_INSTANCES ?= "0"
 OBMC_CHASSIS_INSTANCES ?= "0"
-OBMC_CHECKSTOP_INSTANCES ?= "0"
-OBMC_FAN_INSTANCES ?= ""
 OBMC_HOST_INSTANCES ?= "0"
-OBMC_POWER_BUTTON_INSTANCES ?= "0"
 OBMC_POWER_INSTANCES ?= "0"
-OBMC_RESET_BUTTON_INSTANCES ?= "0"
-OBMC_WATCHDOG_INSTANCES ?= "0"
 
 # obmc-bmc-state-manager
 #