Update ExprHasNoEffect.ql

adding quality tags per metadata styleguide

Author: jonjanego

javascript/ql/src/Expressions/ExprHasNoEffect.ql

@@ -5,10 +5,12 @@
  * @kind problem
  * @problem.severity warning
  * @id js/useless-expression
- * @tags maintainability
+ * @tags quality
+*        maintainability
  *       correctness
  *       external/cwe/cwe-480
  *       external/cwe/cwe-561
+ *       useless-code
  * @precision very-high
  */