Python: Remove old ClickHouseDriver.qll

The merge must've gone wrong some way, as this file is not supposed to
exist in `experimental` anymore.

python/ql/src/experimental/semmle/python/frameworks/ClickHouseDriver.qll

@@ -1,85 +0,0 @@
-/**
- * Provides classes modeling security-relevant aspects of `clickhouse-driver` and `aioch` PyPI packages.
- * See
- * - https://pypi.org/project/clickhouse-driver/
- * - https://pypi.org/project/aioch/
- * - https://clickhouse-driver.readthedocs.io/en/latest/
- */
-
-private import python
-private import semmle.python.Concepts
-private import semmle.python.ApiGraphs
-private import semmle.python.frameworks.PEP249
-
-/**
- * Provides models for `clickhouse-driver` and `aioch` PyPI packages.
- * See
- * - https://pypi.org/project/clickhouse-driver/
- * - https://pypi.org/project/aioch/
- * - https://clickhouse-driver.readthedocs.io/en/latest/
- */
-module ClickHouseDriver {
-  /** Gets a reference to the `clickhouse_driver` module. */
-  API::Node clickhouse_driver() { result = API::moduleImport("clickhouse_driver") }
-
-  /** Gets a reference to the `aioch` module. This module allows to make async db queries. */
-  API::Node aioch() { result = API::moduleImport("aioch") }
-
-  /**
-   * `clickhouse_driver` implements PEP249,
-   * providing ways to execute SQL statements against a database.
-   */
-  class ClickHouseDriverPEP249 extends PEP249ModuleApiNode {
-    ClickHouseDriverPEP249() { this = clickhouse_driver() }
-  }
-
-  module Client {
-    /** Gets a reference to a Client call. */
-    private DataFlow::Node client_ref() {
-      result = clickhouse_driver().getMember("Client").getASubclass*().getAUse()
-      or
-      result = aioch().getMember("Client").getASubclass*().getAUse()
-    }
-
-    /** A direct instantiation of `clickhouse_driver.Client`. */
-    private class ClientInstantiation extends DataFlow::CallCfgNode {
-      ClientInstantiation() { this.getFunction() = client_ref() }
-    }
-
-    /** Gets a reference to an instance of `clickhouse_driver.Client`. */
-    private DataFlow::LocalSourceNode instance(DataFlow::TypeTracker t) {
-      t.start() and
-      result instanceof ClientInstantiation
-      or
-      exists(DataFlow::TypeTracker t2 | result = instance(t2).track(t2, t))
-    }
-
-    /** Gets a reference to an instance of `clickhouse_driver.Client`. */
-    DataFlow::Node instance() { instance(DataFlow::TypeTracker::end()).flowsTo(result) }
-  }
-
-  /** clickhouse_driver.Client execute methods */
-  private string execute_function() {
-    result in ["execute_with_progress", "execute", "execute_iter"]
-  }
-
-  /** Gets a reference to the `clickhouse_driver.Client.execute` method */
-  private DataFlow::LocalSourceNode clickhouse_execute(DataFlow::TypeTracker t) {
-    t.startInAttr(execute_function()) and
-    result = Client::instance()
-    or
-    exists(DataFlow::TypeTracker t2 | result = clickhouse_execute(t2).track(t2, t))
-  }
-
-  /** Gets a reference to the `clickhouse_driver.Client.execute` method */
-  DataFlow::Node clickhouse_execute() {
-    clickhouse_execute(DataFlow::TypeTracker::end()).flowsTo(result)
-  }
-
-  /** A call to the `clickhouse_driver.Client.execute` method */
-  private class ExecuteCall extends SqlExecution::Range, DataFlow::CallCfgNode {
-    ExecuteCall() { this.getFunction() = clickhouse_execute() }
-
-    override DataFlow::Node getSql() { result = this.getArg(0) }
-  }
-}