Merge pull request #448 from metabase/rip_out_old_qb

remove old qb component elements

resources/frontend_client/app/components/canvas/canvas.css

-:root {
-  --canvas-bg-color: #fff;
-  --canvas-offset: 61px;
-}
-
-.Canvas {
-  position: absolute;
-  top: var(--canvas-offset);
-  margin-bottom: calc(var(--canvas-offset) * -1);
-  padding-bottom: var(--canvas-offset);
-  right: 0;
-  height: 100%;
-  overflow-y: scroll;
-  overflow-x: hidden;
-  background-color: var(--canvas-bg-color);
-}
-
-.Canvas--new .card-inner {
-  height: 200px;
-}
-
-.Canvas--new .Card {
-  padding-top: 1em;
-}
-
-.Canvas--new .Card-heading {
-  display: none;
-}
-
-@media screen and (--breakpoint-min-lg) {
-  .Canvas--new .card-inner {
-    height: auto;
-  }
-}

resources/frontend_client/app/components/workspace/workspace.css

-:root {
-  --workspace-bg-color: #F4F6F8;
-  --workspace-border-color: #d9d9d9;
-  --workspace-offset: 61px;
-}
-
-.Workspace {
-  position: absolute;
-  left: 0;
-  top: var(--workspace-offset);
-  padding-bottom: var(--workspace-offset);
-  margin-bottom: calc(var(--workspace-offset) * -1);
-  overflow-y: scroll;
-  bottom: 0;
-  background-color: var(--workspace-bg-color);
-  border-left: 1px solid var(--workspace-border-color);
-  border-right: 1px solid var(--workspace-border-color);
-  z-index: 2;
-  box-shadow: 1px 0 2px rgba(0, 0, 0, .12);
-}
-
-@media screen and (--breakpoint-min-md) {
-  .Workspace {
-    box-shadow: none;
-  }
-}
-

resources/frontend_client/app/components/workspace/workspace.html

-<div class="Workspace col-sm-11 col col-md-3 col-lg-3">
-    <div ng-transclude></div>
-</div>

resources/frontend_client/app/components/workspace/workspace.js

-'use strict';
-
-angular.module('corvus.components')
-    .directive('cvWorkspace', function () {
-
-        function link (scope, element, attrs) {
-        }
-
-        return {
-            restrict: 'E',
-            templateUrl: '/app/components/workspace/workspace.html',
-            transclude: true,
-            scope: {},
-            link: link
-        };
-    });