v5: Drop remaining deprecated mixins (#28461)

- Deletes mixin mentions from float docs
- Deletes mixin mention from visibility docs
- Deletes the image-replacement page for text-hide

site/content/docs/4.3/utilities/float.md

@@ -10,32 +10,12 @@ toc: true
 
 These utility classes float an element to the left or right, or disable floating, based on the current viewport size using the [CSS `float` property](https://developer.mozilla.org/en-US/docs/Web/CSS/float). `!important` is included to avoid specificity issues. These use the same viewport breakpoints as our grid system. Please be aware float utilities have no affect on flex items.
 
-## Classes
-
-Toggle a float with a class:
-
 {{< example >}}
 <div class="float-left">Float left on all viewport sizes</div><br>
 <div class="float-right">Float right on all viewport sizes</div><br>
 <div class="float-none">Don't float on all viewport sizes</div>
 {{< /example >}}
 
-## Mixins
-
-Or by Sass mixin:
-
-{{< highlight scss >}}
-.element {
-  @include float-left;
-}
-.another-element {
-  @include float-right;
-}
-.one-more {
-  @include float-none;
-}
-{{< /highlight >}}
-
 ## Responsive
 
 Responsive variations also exist for each `float` value.

site/content/docs/4.3/utilities/image-replacement.md

@@ -1,35 +0,0 @@
----
-layout: docs
-title: Image replacement
-description: Swap text for background images with the image replacement class.
-group: utilities
----
-
-{{< callout warning >}}
-##### Warning
-
-The `text-hide()` class and mixin has been deprecated as of v4.1. It will be removed entirely in v5.
-{{< /callout >}}
-
-Utilize the `.text-hide` class or mixin to help replace an element's text content with a background image.
-
-{{< highlight html >}}
-<h1 class="text-hide">Custom heading</h1>
-{{< /highlight >}}
-
-{{< highlight scss >}}
-// Usage as a mixin
-.heading {
-  @include text-hide;
-}
-{{< /highlight >}}
-
-Use the `.text-hide` class to maintain the accessibility and SEO benefits of heading tags, but want to utilize a `background-image` instead of text.
-
-<div class="bd-example">
-  <h1 class="text-hide" style="background-image: url('/docs/{{< param docs_version >}}/assets/brand/bootstrap-solid.svg'); width: 50px; height: 50px;">Bootstrap</h1>
-</div>
-
-{{< highlight html >}}
-<h1 class="text-hide" style="background-image: url('...');">Bootstrap</h1>
-{{< /highlight >}}

site/content/docs/4.3/utilities/visibility.md

@@ -22,13 +22,4 @@ Apply `.visible` or `.invisible` as needed.
 .invisible {
   visibility: hidden !important;
 }
-
-// Usage as a mixin
-// Warning: The `invisible()` mixin has been deprecated as of v4.3.0. It will be removed entirely in v5.
-.element {
-  @include invisible(visible);
-}
-.element {
-  @include invisible(hidden);
-}
 {{< /highlight >}}