Update Concepts.qll

Author: ahmed-farid-dev

python/ql/src/experimental/semmle/python/Concepts.qll

@@ -371,39 +371,6 @@ class HeaderDeclaration extends DataFlow::Node {
   DataFlow::Node getValueArg() { result = range.getValueArg() }
 }
 
-/** Provides classes for modeling HTTP Header APIs. */
-module HeaderCollection {
-  /**
-   * A data-flow node that collects functions getting HTTP Headers.
-   *
-   * Extend this class to model new APIs. If you want to refine existing API models,
-   * extend `HeaderCollection` instead.
-   */
-  abstract class Range extends DataFlow::Node {
-    /**
-     * Gets the argument containing the header name.
-     */
-    abstract DataFlow::Node getNameArg();
-  }
-}
-
-/**
- * A data-flow node that collects functions getting HTTP Headers.
- *
- * Extend this class to refine existing API models. If you want to model new APIs,
- * extend `HeaderCollection::Range` instead.
- */
-class HeaderCollection extends DataFlow::Node {
-  HeaderCollection::Range range;
-
-  HeaderCollection() { this = range }
-
-  /**
-   * Gets the argument containing the header name.
-   */
-  DataFlow::Node getNameArg() { result = range.getNameArg() }
-}
-
 /** Provides classes for modeling Csv writer APIs. */
 module CsvWriter {
   /**