Remove useless lines in tracked-controls component (#5770)

* Remove useless lines in tracked-controls component, those should have been removed when tracked-controls-webxr was renamed to tracked-controls in 627698d

* Rename tracked-controls-webxr to tracked-controls in the warning message

Author: vincentfretin

src/components/hand-tracking-controls.js

@@ -149,7 +149,7 @@ export var Component = registerComponent('hand-tracking-controls', {
     xrSession.requestReferenceSpace(referenceSpaceType).then(function (referenceSpace) {
       self.referenceSpace = referenceSpace;
     }).catch(function (error) {
-      self.el.sceneEl.systems.webxr.warnIfFeatureNotRequested(referenceSpaceType, 'tracked-controls-webxr uses reference space ' + referenceSpaceType);
+      self.el.sceneEl.systems.webxr.warnIfFeatureNotRequested(referenceSpaceType, 'tracked-controls uses reference space ' + referenceSpaceType);
       throw error;
     });
   },

src/components/tracked-controls.js

@@ -36,8 +36,8 @@ export var Component = registerComponent('tracked-controls', {
 
   init: function () {
     this.buttonEventDetails = {};
-    this.buttonStates = this.el.components['tracked-controls'].buttonStates = {};
-    this.axis = this.el.components['tracked-controls'].axis = [0, 0, 0];
+    this.buttonStates = {};
+    this.axis = [0, 0, 0];
     this.changedAxes = [];
     this.axisMoveEventDetail = {axis: this.axis, changed: this.changedAxes};
 
@@ -80,8 +80,6 @@ export var Component = registerComponent('tracked-controls', {
       this.data.iterateControllerProfiles,
       this.data.handTrackingEnabled
     );
-    // Legacy handle to the controller for old components.
-    this.el.components['tracked-controls'].controller = this.controller;
   },
 
   tick: function () {