Clean template/helper.go (#23922)

The first step of #23328

This PR cleans:

1. Dead function like `SubStr`
2. Unnecessary function like `UseHTTPS`, it should be provided by
`window.origin`
3. Duplicate function like `IsShowFullName`, there was already a
`DeafultShowFullName`

I have searched these removed functions globally, no use in code.

templates/admin/config.tmpl

@@ -11,7 +11,7 @@
 				<dt>{{.locale.Tr "admin.config.app_name"}}</dt>
 				<dd>{{AppName}}</dd>
 				<dt>{{.locale.Tr "admin.config.app_ver"}}</dt>
-				<dd>{{AppVer}}{{AppBuiltWith}}</dd>
+				<dd>{{AppVer}}{{.AppBuiltWith}}</dd>
 				<dt>{{.locale.Tr "admin.config.custom_conf"}}</dt>
 				<dd>{{.CustomConf}}</dd>
 				<dt>{{.locale.Tr "admin.config.app_url"}}</dt>

templates/repo/clone_buttons.tmpl

@@ -1,7 +1,7 @@
 <!-- there is always at least one button (by context/repo.go) -->
 {{if $.CloneButtonShowHTTPS}}
 	<button class="ui basic small compact clone button gt-no-transition" id="repo-clone-https" data-link="{{$.CloneButtonOriginLink.HTTPS}}">
-		{{if UseHTTPS}}HTTPS{{else}}HTTP{{end}}
+		HTTPS
 	</button>
 {{end}}
 {{if $.CloneButtonShowSSH}}

templates/repo/clone_script.tmpl

@@ -11,7 +11,10 @@
 		const value = localStorage.getItem('repo-clone-protocol') || 'https';
 		const isSSH = value === 'ssh' && sshBtn || value !== 'ssh' && !httpsBtn;
 
-		if (httpsBtn) httpsBtn.classList[!isSSH ? 'add' : 'remove']('primary');
+		if (httpsBtn) {
+			httpsBtn.textContent = window.origin.split(':')[0].toUpperCase();
+			httpsBtn.classList[!isSSH ? 'add' : 'remove']('primary');
+		}
 		if (sshBtn) sshBtn.classList[isSSH ? 'add' : 'remove']('primary');
 
 		const btn = isSSH ? sshBtn : httpsBtn;

templates/repo/search_name.tmpl

@@ -1 +1 @@
-<span class="gt-ellipsis">{{.Name}}{{if IsShowFullName}}<span class="search-fullname"> {{.FullName}}</span>{{end}}</span>
+<span class="gt-ellipsis">{{.Name}}{{if DefaultShowFullName}}<span class="search-fullname"> {{.FullName}}</span>{{end}}</span>