Property initializers from primary constructor parameters

are generated as property initializer expressions
and should not be repeated in primary constructor.

compiler/testData/ir/irText/expressions/arrayAugmentedAssignment1.txt

@@ -15,9 +15,6 @@ FILE /arrayAugmentedAssignment1.kt
     CONSTRUCTOR public constructor C(x: kotlin.IntArray)
       BLOCK_BODY
         DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'
-        SET_BACKING_FIELD 'x: IntArray' type=kotlin.Unit operator=null
-          receiver: THIS of 'C' type=C
-          value: GET_VAR 'value-parameter x: IntArray' type=kotlin.IntArray operator=INITIALIZE_PROPERTY_FROM_PARAMETER
         INSTANCE_INITIALIZER_CALL classDescriptor='C'
     PROPERTY public final val x: kotlin.IntArray
       EXPRESSION_BODY