Remove mergeTicksOptions (#6621)

src/core/core.controller.js

@@ -393,8 +393,6 @@ helpers.extend(Chart.prototype, /** @lends Chart */ {
 				scales[scale.id] = scale;
 			}
 
-			scale.mergeTicksOptions();
-
 			// TODO(SB): I think we should be able to remove this custom case (options.scale)
 			// and consider it as a regular scale part of the "scales"" map only! This would
 			// make the logic easier and remove some useless? custom code.

src/core/core.scale.js

@@ -363,16 +363,6 @@ var Scale = Element.extend({
 	// Any function defined here is inherited by all scale types.
 	// Any function can be extended by the scale type
 
-	/**
-	 * Provided for backward compatibility, not available anymore
-	 * @function Chart.Scale.mergeTicksOptions
-	 * @deprecated since version 2.8.0
-	 * @todo remove at version 3
-	 */
-	mergeTicksOptions: function() {
-		// noop
-	},
-
 	beforeUpdate: function() {
 		helpers.callback(this.options.beforeUpdate, [this]);
 	},

src/scales/scale.time.js

@@ -441,10 +441,6 @@ var defaultConfig = {
 };
 
 module.exports = Scale.extend({
-	initialize: function() {
-		this.mergeTicksOptions();
-		Scale.prototype.initialize.call(this);
-	},
 
 	update: function() {
 		var me = this;