SCons tool cleanup

scons/site_tools/generator/template.py

scons/site_tools/generator/unittest.py

scons/site_tools/internal/__init__.py

scons/site_tools/internal/arm_devices.py

scons/site_tools/internal/configfile.py

scons/site_tools/internal/font.py

scons/site_tools/internal/logger_tools.py

scons/site_tools/internal/platform_tools.py

scons/site_tools/internal/system_design.py

scons/site_tools/xpcc.py