Remove emacs lines from Python and C++ files

examples/channel-models/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/energy/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/error-model/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/ipv6/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/naming/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/realtime/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/routing/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/stats/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/tcp/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/traffic-control/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/tutorial/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/udp/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/wireless/examples-to-run.py

@@ -1,5 +1,4 @@
 #! /usr/bin/env python3
-## -*- Mode: python; py-indent-offset: 4; indent-tabs-mode: nil; coding: utf-8; -*-
 
 # A list of C++ examples to run in order to ensure that they remain
 # buildable and runnable over time.  Each tuple in the list contains

examples/wireless/wifi-eht-network.cc

@@ -1,4 +1,3 @@
-/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
 /*
  * Copyright (c) 2022
  *