Fix JS completion tests: remove unneeded imports, take care about type aliases looking different in completion.

idea/idea-completion/testData/basic/common/StandardJetArrayFirst.kt

@@ -8,7 +8,7 @@ fun main(args: Array<String>) {
 // EXIST_JAVA_ONLY: { lookupString:"Array", tailText:" (java.sql)" }
 
 // todo: unify following two after introducing collection type aliases
-// EXIST_JS_ONLY: { lookupString:"ArrayList", tailText:"<E> (kotlin.collections)" }
+// EXIST: { lookupString:"ArrayList", tailText:"<E> (kotlin.collections)" }
 // EXIST: { lookupString:"ArrayList", tailText:"<E> (java.util)"}
 
 

idea/idea-completion/testData/basic/common/extensions/JavaTypeExtension.kt

@@ -1,11 +1,9 @@
-import java.util.* // temporary until typealiases for collection are introduced in JVM
-
 fun <T> Iterable<T>.first() : T? {
     return this.iterator()?.next()
 }
 
 fun main(args : Array<String>) {
-    val test = HashSet<Int>()
+    val test = HashSet<Int>() // aliased in JVM to java.util.HashSet
     test.<caret>
 }