Reverted explicitly specifying visibility modifier while override

compiler/testData/diagnostics/tests/PrimaryConstructors.jet

@@ -1,4 +1,3 @@
-
 class X {
   val <!MUST_BE_INITIALIZED_OR_BE_ABSTRACT!>x<!> : Int
 }
@@ -18,12 +17,12 @@ class Z : Y() {
 
 class MyIterable<T> : Iterable<T>
 {
-    public override fun iterator(): Iterator<T>  = MyIterator()
+    override fun iterator(): Iterator<T>  = MyIterator()
 
     class MyIterator : Iterator<T>
     {
-        public override val hasNext: Boolean = false
-        public override fun next(): T {
+        override val hasNext: Boolean = false
+        override fun next(): T {
             throw UnsupportedOperationException()
         }
     }

compiler/testData/diagnostics/tests/extensions/GenericIterator.jet

@@ -1,10 +1,10 @@
 import java.util.Enumeration
 
 inline fun <T> java.util.Enumeration<T>.iterator() = object: Iterator<T> {
-  public override val hasNext: Boolean
+  override val hasNext: Boolean
     get() = hasMoreElements()
 
-  public override fun next() = nextElement()
+  override fun next() = nextElement()
 }
 
 fun <T : Any> T?.iterator() = object {

compiler/testData/diagnostics/tests/regressions/kt588.jet

@@ -6,7 +6,7 @@ class Test() : Thread("Test") {
 
         }
     }
-    public override fun run() {
+    override fun run() {
         init2()      // unresolved
         Test.init2() // ok
     }