Remove unused or abused styles (#33918)

* `top aligned` => `tw-align-top`
* label list: it was broken, this PR fixes it
* reference link: simplified
* settings/repos: not affected

templates/user/settings/repos.tmpl

@@ -81,7 +81,7 @@
 				{{end}}
 			{{else}}
 				{{if .Repos}}
-					<div class="ui middle aligned divided list">
+					<div class="ui list">
 						{{range .Repos}}
 							<div class="item">
 								<div class="content flex-text-block">