Remove unused dimensions info from metrics reducer

Author: towerofnix

src/containers/target-pane.jsx

@@ -177,7 +177,6 @@ class TargetPane extends React.Component {
 
             // Determine position of the top-level block based on the target's workspace metrics.
             const {scrollX, scrollY, scale} = metrics;
-            const {width} = this.props.workspaceMetrics.dimensions;
             const posY = -scrollY + 30;
             let posX;
             if (this.props.isRtl) {

src/reducers/workspace-metrics.js

@@ -1,25 +1,13 @@
-const UPDATE_DIMENSIONS = 'scratch-gui/workspace-metrics/UPDATE_DIMENSIONS';
 const UPDATE_METRICS = 'scratch-gui/workspace-metrics/UPDATE_METRICS';
 
 const initialState = {
-    dimensions: {
-        width: 0,
-        height: 0
-    },
     targets: {}
 };
 
 const reducer = function (state, action) {
     if (typeof state === 'undefined') state = initialState;
 
     switch (action.type) {
-    case UPDATE_DIMENSIONS:
-        return Object.assign({}, state, {
-            dimensions: {
-                width: action.width,
-                height: action.height
-            }
-        });
     case UPDATE_METRICS:
         return Object.assign({}, state, {
             targets: Object.assign({}, state.targets, {
@@ -35,13 +23,6 @@ const reducer = function (state, action) {
     }
 };
 
-const updateDimensions = function (dimensions) {
-    return {
-        type: UPDATE_DIMENSIONS,
-        ...dimensions
-    };
-};
-
 const updateMetrics = function (metrics) {
     return {
         type: UPDATE_METRICS,