Revert "docs: add example of rendering images in tooltips (vega#8048)"

This reverts commit a92259e.
ChiaLingWeng · Nov 13, 2023 · 6b9a38d · 6b9a38d
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diff --git a/examples/compiled/text_tooltip_image.png b/examples/compiled/text_tooltip_image.png
diff --git a/examples/compiled/text_tooltip_image.svg b/examples/compiled/text_tooltip_image.svg
diff --git a/examples/compiled/text_tooltip_image.vg.json b/examples/compiled/text_tooltip_image.vg.json
diff --git a/examples/specs/text_tooltip_image.vl.json b/examples/specs/text_tooltip_image.vl.json
diff --git a/site/_includes/docs_toc.md b/site/_includes/docs_toc.md
@@ -374,6 +374,5 @@
     - [Tooltip Based on Encoding]({{site.baseurl}}/docs/tooltip.html#encoding)
     - [Tooltip Based on Underlying Data Point]({{site.baseurl}}/docs/tooltip.html#data)
     - [Tooltip channel]({{site.baseurl}}/docs/tooltip.html#channel)
-    - [Tooltip image]({{site.baseurl}}/docs/tooltip.html#tooltip-image)
     - [Disable tooltips]({{site.baseurl}}/docs/tooltip.html#disable-tooltips)
     - [Vega Tooltip plugin]({{site.baseurl}}/docs/tooltip.html#plugin)
diff --git a/site/docs/tooltip.md b/site/docs/tooltip.md
@@ -64,14 +64,6 @@ To avoid that the tooltips groups the data, add an aggregate to the tooltip enco
 
 <div class="vl-example" data-name="bar_tooltip_aggregate"></div>
 
-## Tooltip image
-
-To display an image in a tooltip you can use the [Vega Tooltip plugin](#plugin). Vega Tooltip requires the special field name `image` to indicate that the field values should be rendered as images instead of displayed as text. The image tooltip can be specified either by setting the `tooltip` property of the mark definition (as detailed above) or by passing the field _as an array_ to the tooltip encoding channel, as in the example below:
-
-<div class="vl-example" data-name="text_tooltip_image"></div>
-
-In addition to providing the path to an image, the Vega Tooltip plugin can also render base64 encoded images prefixed with `data:image/png;base64,` [similarly to how these are rendered inside HTML image tags](https://www.w3docs.com/snippets/html/how-to-display-base64-images-in-html.html). To change the maximum size of the rendered tooltip images, you can adjust the `max-width` and `max-height` properties of the CSS selector `#vg-tooltip-element img`.
-
 ## Disable tooltips
 
 To disable tooltips for a particular single view specification, you can set the `"tooltip"` property of a mark definition block to `null`.