Java to Kotlin converter: do not generate redundant parenthesis for empty constructor parameters

j2k/tests/testData/ast/comments/comments.kt

@@ -8,7 +8,7 @@ import java.util.ArrayList
 // we need ArrayList
 
 // let's declare a class:
-class A /* just a sample name*/() : Runnable /* let's implement Runnable */ {
+class A /* just a sample name*/ : Runnable /* let's implement Runnable */ {
     fun foo/* again a sample name */(p: Int /* parameter p */, c: Char /* parameter c */) {
         // let's print something:
         System.out.println("1") // print 1

j2k/tests/testData/ast/comments/comments2.kt

@@ -1,6 +1,6 @@
 package foo
 
-class A() {
+class A {
     fun /* nothing to return */ foo(/* no parameters at all */) {
         // let declare a variable
         // with 2 comments before

j2k/tests/testData/ast/comments/fieldWithEndOfLineComment.kt

@@ -1,3 +1,3 @@
-class A() {
+class A {
     private val isOpen = true // ideally should be atomic boolean
 }