Remove unused chassis_state

Only display the server/host state on the GUI.

Tested: Searched the repo for 'chassis_state'.
        Built an image, loaded on a Witherspoon, power
        on/off, and verified correct host state.
Change-Id: Ibdefeef7744e08cd737410741a1402ccb9e69200
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/app/common/services/dataService.js b/app/common/services/dataService.js
index b0d359c..275d2f9 100644
--- a/app/common/services/dataService.js
+++ b/app/common/services/dataService.js
@@ -15,7 +15,6 @@
     function(Constants) {
       this.server_health = Constants.SERVER_HEALTH.unknown;
       this.server_state = 'Unreachable';
-      this.chassis_state = 'On';
       this.LED_state = Constants.LED_STATE_TEXT.off;
       this.last_updated = new Date();