Report UNUSED_PARAMETER on main parameter in 1.3+ #KT-26999 Fixed

compiler/testData/diagnostics/tests/controlFlowAnalysis/deadCode/expressionInUnitLiteral.kt

@@ -1,4 +1,4 @@
-fun main(args: Array<String>) {
+fun main() {
     "".run {
         <!UNUSED_EXPRESSION!>""<!>
     }

compiler/testData/diagnostics/tests/controlFlowAnalysis/deadCode/expressionInUnitLiteral.txt

@@ -1,4 +1,4 @@
 package
 
-public fun main(/*0*/ args: kotlin.Array<kotlin.String>): kotlin.Unit
+public fun main(): kotlin.Unit
 public fun </*0*/ T> T.run(/*0*/ f: (T) -> kotlin.Unit): kotlin.Unit