Remove unused imports

- replace !.isEmpty with nonEmpty
- remove unnecessary parentheses

app/views/tags/result_short.scala.html

@@ -3,17 +3,15 @@
 @(id:String, doc: play.api.libs.json.JsValue, i: Int = -1, hits: Seq[String] = Seq())
 
 @import play.api.libs.json._
-@import views.TableRow
 @import controllers.nwbib.Lobid
-@import scala.collection.immutable.Map
 @import play.mvc.Controller.session
 @import play.cache.Cache
 @import controllers.nwbib.Application
 
 @optional(doc: JsValue, key: String, sep: String, alt: String)=@{
-    val other = (doc \\ key)
-    if(!other.isEmpty){
-        sep + other(0).asOpt[String].getOrElse(other(0).as[Seq[JsValue]].map(_.as[String]).mkString("; "))
+    val other = doc \\ key
+    if(other.nonEmpty){
+        sep + other.head.asOpt[String].getOrElse(other.head.as[Seq[JsValue]].map(_.as[String]).mkString("; "))
     } else {alt}
 }