Remove fomantic ".link" selector and styles (#23888)

It's difficult to play with Fomantic's ".link" selector&styles, and it
doesn't bring any real benefit.

Instead, it sometimes introduces regressions (because of the `:not`
selector, really difficult to fine-tune).

Regression:

<details>


![image](https://user-images.githubusercontent.com/2114189/229421849-b48fbcf6-2ae2-4264-b06b-2a06c12e1a4b.png)

</details>

After this PR, there is no ".link" in code anymore. We do not need to
play the overwriting and `:not()` game anymore.


![image](https://user-images.githubusercontent.com/2114189/229422058-476aa5e2-53db-402d-b507-a6063824f835.png)


![image](https://user-images.githubusercontent.com/2114189/229422435-34fde1bc-b2ec-48ec-8c4a-6d8c2610b249.png)


![image](https://user-images.githubusercontent.com/2114189/229422014-cb38c8c7-828f-4a49-a761-95ea824d46a7.png)


![image](https://user-images.githubusercontent.com/2114189/229422031-10f6b4a5-af76-40ee-8fa1-692112a9274f.png)

templates/repo/forks.tmpl

@@ -5,18 +5,12 @@
 		<h2 class="ui dividing header">
 			{{.locale.Tr "repo.forks"}}
 		</h2>
-		<div class="ui list">
-			{{range .Forks}}
-				<div class="item">
-					{{avatar $.Context .Owner}}
-					<div class="link">
-						<a href="{{.Owner.HomeLink}}">{{.Owner.Name}}</a>
-						/
-						<a href="{{.Link}}">{{.Name}}</a>
-					</div>
-				</div>
-			{{end}}
-		</div>
+		{{range .Forks}}
+			<div class="gt-df gt-ac gt-py-3">
+				<span class="gt-mr-2">{{avatar $.Context .Owner}}</span>
+				<a href="{{.Owner.HomeLink}}">{{.Owner.Name}}</a> / <a href="{{.Link}}">{{.Name}}</a>
+			</div>
+		{{end}}
 	</div>
 
 	{{template "base/paginate" .}}