[WIP] JS lint and dead code removal (#1053)

* lint and dead code removal

* fix regressions

client/src/reducers/centroidLabel.js

@@ -1,5 +1,3 @@
-import calcCentroid from "../util/centroid";
-
 const initialState = {
   metadataField: "",
   categoryIndex: -1,
@@ -8,7 +6,7 @@ const initialState = {
 };
 
 const CentroidLabel = (state = initialState, action, sharedNextState) => {
-  const { categoricalSelection, world, layoutChoice } = sharedNextState;
+  const { categoricalSelection } = sharedNextState;
   const { metadataField, categoryIndex } = action;
   const categoryField =
     categoricalSelection?.[metadataField]?.categoryValues[categoryIndex];
@@ -19,12 +17,7 @@ const CentroidLabel = (state = initialState, action, sharedNextState) => {
         metadataField,
         categoryIndex,
         categoryField,
-        centroidXY: null /* calcCentroid(  This function call is computationally heavy and also leading to large GC. Before reimplementation, look into optimization and memoization
-          world,
-          metadataField,
-          categoryField,
-          layoutChoice.currentDimNames
-        ) */
+        centroidXY: null
       };
 
     case "category value mouse hover end":

client/src/reducers/colors.js

@@ -55,7 +55,7 @@ const ColorsReducer = (
 
     case "annotation: delete category": {
       const { colorAccessor } = state;
-      if (action.metadataField != colorAccessor) {
+      if (action.metadataField !== colorAccessor) {
         return state;
       }
       /* else reset */