Fix ESLint errors

Author: six-ddc

core/block_outline.js

@@ -331,7 +331,6 @@ Blockly.BlockOutline.prototype.onMinimapClick_ = function(e) {
   var matrix = this.svgGroup_.getScreenCTM().inverse();
   point = point.matrixTransform(matrix);
 
-  var bounds = this.getWorkspaceBounds_();
   var metrics = this.workspace_.getMetrics();
   var workspaceScale = this.workspace_.scale || 1;
 

core/collapse_gutter.js

@@ -138,14 +138,14 @@ Blockly.CollapseGutter.prototype.createDom = function() {
   // Hover effects (same as minimap) - save listeners for cleanup
   var self = this;
   this.eventListeners_.push(
-    Blockly.bindEvent_(this.svgGroup_, 'mouseenter', null, function() {
-      self.svgGroup_.setAttribute('opacity', '0.8');
-    })
+      Blockly.bindEvent_(this.svgGroup_, 'mouseenter', null, function() {
+        self.svgGroup_.setAttribute('opacity', '0.8');
+      })
   );
   this.eventListeners_.push(
-    Blockly.bindEvent_(this.svgGroup_, 'mouseleave', null, function() {
-      self.svgGroup_.setAttribute('opacity', '0.5');
-    })
+      Blockly.bindEvent_(this.svgGroup_, 'mouseleave', null, function() {
+        self.svgGroup_.setAttribute('opacity', '0.5');
+      })
   );
 
   return this.svgGroup_;
@@ -244,7 +244,7 @@ Blockly.CollapseGutter.prototype.createButton_ = function(block, inputName) {
   }, null);
 
   // Transparent circle for larger click area (invisible)
-  var clickArea = Blockly.utils.createSvgElement('circle', {
+  Blockly.utils.createSvgElement('circle', {
     'r': '10',
     'fill': 'transparent',
     'stroke': 'none'

core/collapse_icon.js

@@ -236,9 +236,9 @@ Blockly.CollapseIcon.prototype.isVisible = function() {
 
 /**
  * This icon doesn't have a bubble to show/hide.
- * @param {boolean} visible Ignored.
+ * @param {boolean} _visible Ignored.
  */
-Blockly.CollapseIcon.prototype.setVisible = function(visible) {
+Blockly.CollapseIcon.prototype.setVisible = function(_visible) {
   // No-op, this icon doesn't have a bubble
 };
 

core/grid.js

@@ -325,7 +325,7 @@ Blockly.Grid.prototype.showColumnGuide = function(block, targetY, opt_showProjec
     var defs = this.columnGuideGroup_.ownerDocument.querySelector('defs');
     if (!defs) {
       defs = Blockly.utils.createSvgElement('defs', {},
-        this.columnGuideGroup_.ownerSVGElement);
+          this.columnGuideGroup_.ownerSVGElement);
     }
 
     var gradient = Blockly.utils.createSvgElement('linearGradient', {
@@ -355,7 +355,7 @@ Blockly.Grid.prototype.showColumnGuide = function(block, targetY, opt_showProjec
     }, gradient);
 
     // Create wider shadow layer (outer)
-    var shadow = Blockly.utils.createSvgElement('line', {
+    Blockly.utils.createSvgElement('line', {
       'x1': 48,
       'y1': targetY,
       'x2': 48,
@@ -366,7 +366,7 @@ Blockly.Grid.prototype.showColumnGuide = function(block, targetY, opt_showProjec
     }, this.columnGuideGroup_);
 
     // Create sharper projection line (inner)
-    var projection = Blockly.utils.createSvgElement('line', {
+    Blockly.utils.createSvgElement('line', {
       'x1': 48,
       'y1': targetY,
       'x2': 48,