Adjust query tags

Author: tamasvajk

java/ql/src/Violations of Best Practice/SpecialCharactersInLiterals/NonExplicitControlAndWhitespaceCharsInLiterals.ql

@@ -7,7 +7,6 @@
  * @precision medium
  * @problem.severity warning
  * @tags quality
- *       correctness
  *       maintainability
  *       readability
  */