Remove OI/NI attributes from test data

compiler/testData/diagnostics/tests/smartCasts/varnotnull/plusplusMinusminus.kt

@@ -11,7 +11,7 @@ operator fun Long?.inc() = this?.let { it + 1 }
 fun bar(arg: Long?): Long {
     var i = arg
     if (i++ == 5L) {
-        return i<!UNSAFE_CALL!>--<!> <!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE{OI}, DEBUG_INFO_MISSING_UNRESOLVED{NI}!>+<!> i
+        return i<!UNSAFE_CALL!>--<!> <!DEBUG_INFO_MISSING_UNRESOLVED!>+<!> i
     }
     if (i++ == 7L) {
         return i++ <!UNSAFE_OPERATOR_CALL!>+<!> <!TYPE_MISMATCH!>i<!>