Drop Normalize, port relevant parts to Reboot (#21741)

* Get this party started by removing mention of Normalize.css

* Nuke the old comment, consolidate to a single line and number as appropriate

* Bring over styles for HTML element from Normalize to Reboot

* Move margin override for body element from Normalize to Reboot

* Drop the block reset for HTML5 elements in IE9- from Normalize given we dropped IE9 support

* Building on previous commit, do the same thing for figure, figcaption, and main

* Remove IE9- display from Normalize given our browser support

* Drop IE8 figure margin because we're IE10+

* No need for the h1 overrides because we reset these font and margin styles anyway in _type.scss already

* Drop Safari 6 b and strong normalization because we're Safari 8+

* Remove mark styles for IE9- from Normalize

* Remove old iOS audio fixes from Normalize

* Remove IE9- display for progress from Normalize

* Remove more IE9- rules from Normalize

* One more IE9- display removal for canvas element

* Move pre overrides from Normalize to Reboot

* Move over some link resets to Reboot, drop others

- Move over background-color and text-decoration
- Drop focus outline change given it affects the offset on hover of
focused links

* Move over more code element resets, consolidate with pre overrides, too

* Move over sub and sup wholesale

* Move over img normalization to Reboot

* Move over SVG override too

* - Drop dupe hidden, but add comment for it
- Move over template
- Move over summary

* Remove bulk of @viewport comment

* edit down that code comment

* consolidate html-based normalizations

* update comments

* Consolidate abbr styles

* move over more type elements

* move over hr changes

* move over form controls and more

* move over button resets

* move over firefox button changes

* move over search changes and more

* we nuke all these styles for fieldsets anyway, so outright remove them

* no need for those, we override them

* move over legend, fieldset, progress

* line break

* delete normalize file

* linting

* update comment

* clarify docs mentions of normalize and reboot

* remove normalize excludes from linter

* remove normalize excludes from cli task

* linting

* callout license since we forked part of normalize

* Improve comments, move table background reset to .table class instead of in reboot

* trailing space

2 files changed, 2 insertions, 2 deletions

diff --git a/docs/content/reboot.md b/docs/content/reboot.md
index 08ad15a6a..ff4f0dc72 100644
--- a/docs/content/reboot.md
+++ b/docs/content/reboot.md
@@ -1,7 +1,7 @@
 ---
 layout: docs
 title: Reboot
-description: Documentation and examples for Reboot, Bootstrap's collection of element-specific CSS that builds on Normalize.css.
+description: Documentation and examples for Reboot, Bootstrap's collection of element-specific CSS that heavily builds on Normalize.css.
 group: content
 redirect_from: "/content/"
 ---
diff --git a/docs/content/typography.md b/docs/content/typography.md
index 7e3fbe726..4fe5bbe02 100644
--- a/docs/content/typography.md
+++ b/docs/content/typography.md
@@ -155,7 +155,7 @@ Change text alignment, transform, style, weight, and color with our [text utilit
 
 ## Abbreviations
 
-Stylized implementation of HTML's `<abbr>` element for abbreviations and acronyms to show the expanded version on hover. Abbreviations have a default underline from Normalize.css and gain a help cursor to provide additional context on hover and to users of assistive technologies.
+Stylized implementation of HTML's `<abbr>` element for abbreviations and acronyms to show the expanded version on hover. Abbreviations have a default underline and gain a help cursor to provide additional context on hover and to users of assistive technologies.
 
 Add `.initialism` to an abbreviation for a slightly smaller font-size.