KT-46146 no 'protected' for final classes

Intention to change final class constructor visibility to 'protected'
was erroneous. This commit removes it.

idea/testData/quickfix/removeUnused/secondaryConstructorFromJava.before.Main.kt

@@ -2,7 +2,6 @@
 // ACTION: Convert to primary constructor
 // ACTION: Make internal
 // ACTION: Make private
-// ACTION: Make protected
 
 class Ctor {
     <caret>constructor(p: Int)