Remove duplicate logic introduced by exists(VarRef ... )

Author: jeongsoolee09

javascript/frameworks/cap/lib/advanced_security/javascript/frameworks/cap/CQL.qll

@@ -8,18 +8,16 @@ import advanced_security.javascript.frameworks.cap.CDS
  */
 class CqlQueryBase extends VarRef {
   CqlQueryBase() {
-    exists(VarRef varRef | this = varRef |
-      exists(string name |
-        varRef.getName() = name and
-        name in ["SELECT", "INSERT", "DELETE", "UPDATE", "UPSERT"] and
-        (
-          /* Made available as a global variable */
-          exists(GlobalVariable queryBase | this = queryBase.getAReference())
-          or
-          /* Imported from `cds.ql` */
-          exists(CdsFacade cds |
-            cds.getMember("ql").getMember(name).getAValueReachableFromSource().asExpr() = this
-          )
+    exists(string name |
+      this.getName() = name and
+      name in ["SELECT", "INSERT", "DELETE", "UPDATE", "UPSERT"] and
+      (
+        /* Made available as a global variable */
+        exists(GlobalVariable queryBase | this = queryBase.getAReference())
+        or
+        /* Imported from `cds.ql` */
+        exists(CdsFacade cds |
+          cds.getMember("ql").getMember(name).getAValueReachableFromSource().asExpr() = this
         )
       )
     )