KT-1175 Mark unused literals

compiler/testData/diagnostics/tests/shadowing/ShadowParameterInNestedBlockInFor.jet

@@ -1,7 +1,7 @@
 fun f(<!UNUSED_PARAMETER!>i<!>: Int) {
     for (j in 1..100) {
-        {
+        <!UNUSED_FUNCTION_LITERAL!>{
             var <!NAME_SHADOWING!>i<!> = 12
-        }
+        }<!>
     }
 }

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedBlock.jet

@@ -1,7 +1,7 @@
 fun ff(): Int {
     var i = 1
-    {
+    <!UNUSED_FUNCTION_LITERAL!>{
         val <!NAME_SHADOWING!>i<!> = 2
-    }
+    }<!>
     return i
-}
+}

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedClosure.jet

@@ -1,5 +1,5 @@
 fun f(): Int {
     var i = 17
-    { (): Unit -> var <!NAME_SHADOWING!>i<!> = 18 }
+    <!UNUSED_FUNCTION_LITERAL!>{ (): Unit -> var <!NAME_SHADOWING!>i<!> = 18 }<!>
     return i
-}
+}

compiler/testData/diagnostics/tests/shadowing/ShadowVariableInNestedClosureParam.jet

@@ -1,5 +1,5 @@
 fun ff(): Int {
     var i = 1
-    { (i: Int) -> i }
+    <!UNUSED_FUNCTION_LITERAL!>{ (i: Int) -> i }<!>
     return i
-}
+}