Apply suggestions from code review

Co-authored-by: Rasmus Wriedt Larsen <rasmuswriedtlarsen@gmail.com>

Author: sylwia-budzynska

python/ql/lib/semmle/python/frameworks/Cx_Oracle.qll

@@ -21,9 +21,6 @@ private import semmle.python.frameworks.PEP249
  * - https://pypi.org/project/cx-Oracle/
  */
 private module Cx_Oracle {
-  // ---------------------------------------------------------------------------
-  // Cx_Oracle
-  // ---------------------------------------------------------------------------
   /**
    * A model for Cx_Oracle as a module that implements PEP 249, providing ways to execute SQL statements
    * against a database.

python/ql/lib/semmle/python/frameworks/Phoenixdb.qll

@@ -21,9 +21,6 @@ private import semmle.python.frameworks.PEP249
  * - https://pypi.org/project/phoenixdb/
  */
 private module Phoenixdb {
-  // ---------------------------------------------------------------------------
-  // Phoenixdb
-  // ---------------------------------------------------------------------------
   /**
    * A model for Phoenixdb as a module that implements PEP 249, providing ways to execute SQL statements
    * against a database.

python/ql/lib/semmle/python/frameworks/Pyodbc.qll

@@ -21,9 +21,6 @@ private import semmle.python.frameworks.PEP249
  * - https://pypi.org/project/pyodbc/
  */
 private module Pyodbc {
-  // ---------------------------------------------------------------------------
-  // Pyodbc
-  // ---------------------------------------------------------------------------
   /**
    * A model for Pyodbc as a module that implements PEP 249, providing ways to execute SQL statements
    * against a database.