Coding Standards: Apply coding standards on CSS.

Remove units when the value is zero. Combine redundant values in shorthand declarations.
This was generated with `stylelint --fix` and a custom config (see #53866).

Props ankitmaru, audrasjb, pbiron, ayeshrajans, hareesh-pillai, netweb, mukesh27.
Fixes #53866.


Built from https://develop.svn.wordpress.org/trunk@51727


git-svn-id: http://core.svn.wordpress.org/trunk@51333 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/css/install.css

@@ -9,7 +9,7 @@ body {
 	color: #3c434a;
 	font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
 	margin: 140px auto 25px;
-	padding: 20px 20px 10px 20px;
+	padding: 20px 20px 10px;
 	max-width: 700px;
 	-webkit-font-smoothing: subpixel-antialiased;
 	box-shadow: 0 1px 1px rgba(0, 0, 0, 0.04);
@@ -78,7 +78,7 @@ label {
 
 #logo {
 	margin: -130px auto 25px;
-	padding: 0 0 25px 0;
+	padding: 0 0 25px;
 	width: 84px;
 	height: 84px;
 	overflow: hidden;
@@ -141,7 +141,7 @@ textarea {
 }
 
 .form-table p {
-	margin: 4px 0 0 0;
+	margin: 4px 0 0;
 	font-size: 11px;
 }