Tools: logger_metadata: remove useless shebang

Tools/autotest/logger_metadata/emit_html.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 from __future__ import print_function
 
 import emitter

Tools/autotest/logger_metadata/emit_rst.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 from __future__ import print_function
 
 import emitter

Tools/autotest/logger_metadata/emit_xml.py

@@ -1,5 +1,3 @@
-#!/usr/bin/env python
-
 from __future__ import print_function
 
 from lxml import etree