Merge pull request #14792 from grafana/adios-scrollbar

chore: Remove ScrollBar component, superseded by CustomScrollbar

public/app/core/components/ScrollBar/ScrollBar.tsx

-import React from 'react';
-import baron from 'baron';
-
-export interface Props {
-  children: any;
-  className: string;
-}
-
-export default class ScrollBar extends React.Component<Props, any> {
-  private container: any;
-  private scrollbar: baron;
-
-  constructor(props) {
-    super(props);
-  }
-
-  componentDidMount() {
-    this.scrollbar = baron({
-      root: this.container.parentElement,
-      scroller: this.container,
-      bar: '.baron__bar',
-      barOnCls: '_scrollbar',
-      scrollingCls: '_scrolling',
-      track: '.baron__track',
-    });
-  }
-
-  componentDidUpdate() {
-    this.scrollbar.update();
-  }
-
-  componentWillUnmount() {
-    this.scrollbar.dispose();
-  }
-
-  // methods can be invoked by outside
-  setScrollTop(top) {
-    if (this.container) {
-      this.container.scrollTop = top;
-      this.scrollbar.update();
-
-      return true;
-    }
-    return false;
-  }
-
-  setScrollLeft(left) {
-    if (this.container) {
-      this.container.scrollLeft = left;
-      this.scrollbar.update();
-
-      return true;
-    }
-    return false;
-  }
-
-  update() {
-    this.scrollbar.update();
-  }
-
-  handleRef = ref => {
-    this.container = ref;
-  };
-
-  render() {
-    return (
-      <div className="baron baron__root baron__clipper">
-        <div className={this.props.className + ' baron__scroller'} ref={this.handleRef}>
-          {this.props.children}
-        </div>
-
-        <div className="baron__track">
-          <div className="baron__bar" />
-        </div>
-      </div>
-    );
-  }
-}