qcacld-3.0: Remove CONFIG_SUPPORT_HOST_STATISTICS from Kbuild

CONFIG_SUPPORT_HOST_STATISTICS is set but then never referenced, so
remove it from Kbuild.

Change-Id: Ib2ec5dfe1a1e10e04116b097296c5bacc6ece9cd
CRs-Fixed: 2221853

Kbuild

@@ -340,9 +340,6 @@ CONFIG_ATH_SUPPORT_FLOWMAC_MODULE := n
 #Enable spectral support
 CONFIG_ATH_SUPPORT_SPECTRAL := n
 
-#Enable HOST statistics support
-CONFIG_SUPPORT_HOST_STATISTICS := n
-
 #Enable WDI Event support
 CONFIG_WDI_EVENT_ENABLE := y