Ruby: remove another unused class

Author: asgerf

ruby/ql/src/experimental/cwe-807/ConditionalBypass.ql

@@ -28,28 +28,6 @@ predicate flowsToGuardExpr(DataFlow::Node nd, SensitiveActionGuardConditional gu
   exists(DataFlow::Node succ | localFlowStep(nd, succ) | flowsToGuardExpr(succ, guard))
 }
 
-/**
- * A comparison that guards a sensitive action, e.g. the comparison in:
- * ```rb
- * ok = x == y
- * if ok
- *   login
- * end
- * ```
- */
-class SensitiveActionGuardComparison extends ComparisonOperation {
-  SensitiveActionGuardConditional guard;
-
-  SensitiveActionGuardComparison() {
-    exists(DataFlow::Node node | this = node.asExpr().getExpr() | flowsToGuardExpr(node, guard))
-  }
-
-  /**
-   * Gets the guard that uses this comparison.
-   */
-  SensitiveActionGuardConditional getGuard() { result = guard }
-}
-
 /**
  * Holds if `sink` guards `action`, and `source` taints `sink`.
  *