KT-1151 Code completion for not imported extension functions - ignore parameters

idea/testData/completion/basic/multifile/NotImportedExtensionFunction-2.kt

@@ -3,5 +3,9 @@ package second
 fun String.helloFun() {
 }
 
+fun String.helloWithParams(i : Int) : String {
+    return ""
+}
+
 fun String.helloFunPreventAutoInsert() {
 }