Remove searchFilter property from Sensors page

The searchFilter data prop is included in the SearchFilterMixin,
so can be removed from the Sensors component.

Signed-off-by: Yoshie Muranaka <yoshiemuranaka@gmail.com>
Change-Id: Iba40439de0aa01458cf95157f25124e0b08669f1
diff --git a/src/views/Health/Sensors/Sensors.vue b/src/views/Health/Sensors/Sensors.vue
index c234359..20a3229 100644
--- a/src/views/Health/Sensors/Sensors.vue
+++ b/src/views/Health/Sensors/Sensors.vue
@@ -182,7 +182,6 @@
         }
       ],
       activeFilters: [],
-      searchFilter: null,
       searchTotalFilteredRows: 0
     };
   },