Do not insert explicit visibility modifier if it's default

idea/testData/intentions/changeVisibility/protected/caretAfter.kt.after

@@ -0,0 +1,3 @@
+class C {
+    protected<caret> fun foo(){}
+}

idea/testData/intentions/changeVisibility/protected/overrideVisibilityToDefault.kt.after

@@ -3,5 +3,5 @@ interface I {
 }
 
 abstract class C : I {
-    <caret>protected override fun foo() {}
+    <caret>override fun foo() {}
 }

idea/testData/intentions/changeVisibility/public/caretAfter.kt.after

@@ -1,3 +0,0 @@
-class C {
-    public<caret> fun foo(){}
-}

idea/testData/intentions/changeVisibility/public/forOverride2.kt

@@ -0,0 +1,7 @@
+interface I {
+    protected fun foo()
+}
+
+abstract class C : I {
+    <caret>override fun foo() {}
+}

idea/testData/intentions/changeVisibility/public/forOverride2.kt.after

@@ -0,0 +1,7 @@
+interface I {
+    protected fun foo()
+}
+
+abstract class C : I {
+    <caret>public override fun foo() {}
+}

idea/testData/intentions/changeVisibility/public/primaryConstructor.kt.after

@@ -1,2 +1,2 @@
 // INTENTION_TEXT: Make public
-class C <caret>public constructor(val v: Int)
+class C <caret>(val v: Int)

idea/testData/intentions/changeVisibility/public/simple.kt.after

@@ -1,3 +1,3 @@
 class C {
-    <caret>public fun foo(){}
+    <caret>fun foo(){}
 }

idea/testData/quickfix/modifiers/visibilityModifer1.kt.after

@@ -4,5 +4,5 @@ open class A {
 }
 
 class B : A() {
-    <caret>protected override fun run() {}
+    <caret>override fun run() {}
 }

idea/testData/quickfix/modifiers/visibilityModifer2.kt.after

@@ -4,5 +4,5 @@ open class A {
 }
 
 class B : A() {
-    <caret>protected override fun run() {}
+    <caret>override fun run() {}
 }

idea/testData/quickfix/modifiers/visibilityModiferOverrideJavaRuntime.kt.after

@@ -1,6 +1,6 @@
 // "Change visibility modifier" "true"
 abstract class C : ClassLoader() {
-    <caret>protected override fun findClass(var1: String): Class<*> {
+    <caret>override fun findClass(var1: String): Class<*> {
         throw ClassNotFoundException(var1)
     }
 }