Remove comments from function/property implementation template

#KT-18539 Fixed

idea/testData/quickfix/override/implementMember.kt.after

@@ -6,6 +6,6 @@ interface I {
 
 class A : I {
     override fun foo() {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 }

idea/testData/quickfix/override/implementMemberFromAbstractClass.kt.after

@@ -6,6 +6,6 @@ abstract class A {
 
 class B : A() {
     override fun foo() {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 }

idea/testData/quickfix/override/nothingToOverride/addFunctionNonUnitReturnType.kt.after

@@ -2,7 +2,7 @@
 // WITH_RUNTIME
 open class A {
     open fun f(): Int {
-        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+        TODO("Not yet implemented")
     }
 }
 class B : A() {