Drop .blockquote-reverse, replace with text utils, and redesign blockquote to not have a border

docs/4.0/content/typography.md

@@ -202,12 +202,19 @@ Add a `<footer class="blockquote-footer">` for identifying the source. Wrap the
 </blockquote>
 {% endexample %}
 
-### Reverse layout
+### Alignment
 
-Add `.blockquote-reverse` for a blockquote with right-aligned content.
+Use text utilities as needed to change the alignment of your blockquote.
 
 {% example html %}
-<blockquote class="blockquote blockquote-reverse">
+<blockquote class="blockquote text-center">
+  <p class="mb-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
+  <footer class="blockquote-footer">Someone famous in <cite title="Source Title">Source Title</cite></footer>
+</blockquote>
+{% endexample %}
+
+{% example html %}
+<blockquote class="blockquote text-right">
   <p class="mb-0">Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.</p>
   <footer class="blockquote-footer">Someone famous in <cite title="Source Title">Source Title</cite></footer>
 </blockquote>

scss/_type.scss

@@ -108,10 +108,8 @@ mark,
 
 // Blockquotes
 .blockquote {
-  padding: ($spacer / 2) $spacer;
   margin-bottom: $spacer;
   font-size: $blockquote-font-size;
-  border-left: $blockquote-border-width solid $blockquote-border-color;
 }
 
 .blockquote-footer {
@@ -123,21 +121,3 @@ mark,
     content: "\2014 \00A0"; // em dash, nbsp
   }
 }
-
-// Opposite alignment of blockquote
-.blockquote-reverse {
-  padding-right: $spacer;
-  padding-left: 0;
-  text-align: right;
-  border-right: $blockquote-border-width solid $blockquote-border-color;
-  border-left: 0;
-}
-
-.blockquote-reverse .blockquote-footer {
-  &::before {
-    content: "";
-  }
-  &::after {
-    content: "\00A0 \2014"; // nbsp, em dash
-  }
-}

scss/_variables.scss

@@ -279,8 +279,6 @@ $text-muted: $gray-600 !default;
 
 $blockquote-small-color:  $gray-600 !default;
 $blockquote-font-size:    ($font-size-base * 1.25) !default;
-$blockquote-border-color: $gray-200 !default;
-$blockquote-border-width: .25rem !default;
 
 $hr-border-color: rgba($black,.1) !default;
 $hr-border-width: $border-width !default;