small fix Value::isConvertibleTo

Author: pavel-pimenov

src/lib_json/json_value.cpp

@@ -832,7 +832,6 @@ bool Value::isConvertibleTo(ValueType other) const {
            (type() == realValue && InRange(value_.real_, 0, maxUInt)) ||
            type() == booleanValue || type() == nullValue;
   case realValue:
-    return isNumeric() || type() == booleanValue || type() == nullValue;
   case booleanValue:
     return isNumeric() || type() == booleanValue || type() == nullValue;
   case stringValue: