.editorconfig is a great way to ensure developers follow our
line ending/tab conventions, but we shouldn't have it default
to fixing any lines that were not edited.

(and remove some web file types that will probably never be in APM)

# This file provide reference settings for the APM code conventions
# There are plug-ins available for nearly every text editor to automatically
# respect the conventions contained within this file.
#
# Please see editorconfig.org for complete information.
#
# If you find errors in this file, please send a pull-request with a fix.
#