Remove unnecessary code

Author: lunny

templates/base/head_script.tmpl

@@ -13,7 +13,6 @@ If you introduce mistakes in it, Gitea JavaScript code wouldn't run correctly.
 		assetVersionEncoded: encodeURIComponent('{{AssetVersion}}'), // will be used in URL construction directly
 		assetUrlPrefix: '{{AssetUrlPrefix}}',
 		runModeIsProd: {{.RunModeIsProd}},
-		defaultShowFullName: {{DefaultShowFullName}},
 		customEmojis: {{CustomEmojis}},
 		csrfToken: '{{.CsrfToken}}',
 		pageData: {{.PageData}},