fix device observation deletion method

tsmatch_client/src/reducer/observation.js

@@ -28,11 +28,15 @@ const observation = (state = initialState, action) => {
             });
             break;
         case 'REMOVE_DEVICE_OBSERVATIONS':
-            state.observationList.forEach(function (observation) {
-                if (observation.sensorIds.includes(action.deviceId)){
+            let counter = 0;
+            while (counter < state.observationList.length) {
+                let observation = state.observationList[counter];
+                if (observation.sensorIds.includes(action.deviceId)) {
                     state.observationList.splice(state.observationList.indexOf(observation), 1);
+                } else {
+                    counter++;
                 }
-            })
+            }
     }
 
     return {observationList: state.observationList};