revert: Revert "feat: Table rendering support for databars (deephaven#1212)" (deephaven#1296)

This reverts commit a17cc0e.

- Noticed an issue when changing filters on a table with a string column
which would cause `null` to be flashed in. Caused by the databar
changes. We don't need the databars for this release so just reverting
that change for now.

![Table shows null to
start](https://github.com/deephaven/web-client-ui/assets/4505624/ced45b58-9caf-4f9e-8ffc-3218294db300)

Author: mofojed

packages/code-studio/src/styleguide/Grids.tsx

@@ -13,7 +13,6 @@ import StaticExample from './grid-examples/StaticExample';
 import QuadrillionExample from './grid-examples/QuadrillionExample';
 import TreeExample from './grid-examples/TreeExample';
 import AsyncExample from './grid-examples/AsyncExample';
-import DataBarExample from './grid-examples/DataBarExample';
 
 function Grids(): ReactElement {
   const [irisGridModel] = useState(
@@ -35,10 +34,6 @@ function Grids(): ReactElement {
         <div style={{ height: 200 }}>
           <StaticExample />
         </div>
-        <h2 className="ui-title">Data Bar</h2>
-        <div style={{ height: 500 }}>
-          <DataBarExample />
-        </div>
         <h2 className="ui-title">Quadrillion rows and columns</h2>
         <div style={{ height: 500, position: 'relative' }}>
           <QuadrillionExample />