UX: remove fast scroll which is leading to bugs

app/assets/javascripts/discourse/components/topic-timeline.js.es6

@@ -47,17 +47,6 @@ export default MountWidget.extend(Docking, {
     this.queueRerender();
   },
 
-  fastDockCheck(){
-    // we need to dock super fast here, avoid any slow methods
-    // this is not debounced
-    const offset = window.pageYOffset;
-
-    if (offset && this.fastDockAt && offset > this.fastDockAt) {
-      this.fastDockAt = null;
-      $('.timeline-container').addClass('timeline-docked timeline-docked-bottom');
-    }
-  },
-
   dockCheck(info) {
     const mainOffset = $('#main').offset();
     const offsetTop = mainOffset ? mainOffset.top : 0;

app/assets/javascripts/discourse/mixins/docking.js.es6

@@ -12,12 +12,6 @@ export default Ember.Mixin.create({
   init() {
     this._super();
     this.queueDockCheck = () => {
-
-      // we want to do a very fast non-debounced check first
-      if (this.fastDockCheck) {
-        this.fastDockCheck();
-      }
-
       Ember.run.debounce(this, this.safeDockCheck, 5);
     };
   },