Remove empty selectors.

libretto/css/blocks.css

@@ -81,17 +81,6 @@ p.has-drop-cap:not(:focus)::first-letter {
 	margin: 0 0 .75em;
 }
 
-.wp-block-quote,
-.wp-block-quote.is-large p,
-.wp-block-quote.is-style-large p {
-}
-
-.wp-block-quote.alignleft {
-}
-
-.wp-block-quote.alignright {
-}
-
 .wp-block-quote cite {
 	display: block;
 	width: 100%;
@@ -99,16 +88,6 @@ p.has-drop-cap:not(:focus)::first-letter {
 	text-align: right;
 }
 
-.wp-block-quote.is-large cite,
-.wp-block-quote.is-large footer,
-.wp-block-quote.is-style-large cite,
-.wp-block-quote.is-style-large footer {
-}
-
-.wp-block-quote.is-large,
-.wp-block-quote.is-style-large {
-}
-
 .wp-block-quote.is-large,
 .wp-block-quote.is-style-large,
 .wp-block-quote.is-large p,
@@ -369,9 +348,6 @@ hr.wp-block-separator {
 	text-decoration: none;
 }
 
-.wp-block-latest-comments__comment-date {
-}
-
 .wp-block-latest-comments .wp-block-latest-comments__comment {
 	border-top: 1px solid #d9d6d0;
 	margin-bottom: 0;

libretto/css/editor-blocks.css

@@ -403,12 +403,6 @@ See: https://stackoverflow.com/questions/16348489/is-there-a-css-hack-for-safari
 	display: inline;
 }
 
-.rtl .editor-block-list__block .wp-block-quote:not(.is-large):not(.is-style-large) {
-}
-
-.rtl .editor-block-list__block .wp-block-quote {
-}
-
 .editor-block-list__block .wp-block-quote em,
 .editor-block-list__block .wp-block-quote i {
 	font-style: normal;
@@ -445,10 +439,6 @@ See: https://stackoverflow.com/questions/16348489/is-there-a-css-hack-for-safari
 	margin-bottom: .75em;
 }
 
-.rtl .editor-block-list__block .wp-block-quote:not(.is-large):not(.is-style-large).alignleft,
-.rtl .editor-block-list__block .wp-block-quote:not(.is-large):not(.is-style-large).alignright  {
-}
-
 .wp-block-quote.is-large,
 .wp-block-quote.is-style-large {
 	font-size: 32px;
@@ -593,16 +583,10 @@ See: https://stackoverflow.com/questions/16348489/is-there-a-css-hack-for-safari
 	z-index: 2;
 }
 
-.wp-block-freeform.block-library-rich-text__tinymce blockquote p {
-}
-
 .wp-block-freeform.block-library-rich-text__tinymce blockquote > :last-child {
 	margin-bottom: 0;
 }
 
-.editor-block-list__block .wp-block-freeform.block-library-rich-text__tinymce blockquote:not(.alignleft):not(.alignright) {
-}
-
 .wp-block-freeform.block-library-rich-text__tinymce blockquote cite {
 	color: #787065;
 	display: block;