hgweb: remove unused/nonexistent filelogentry from atom/map
filelog in atom style uses changelogentry to show commits, and
atom/filelogentry.tmpl doesn't even exist.
default = 'changelog'
feedupdated = '<updated>{date|rfc3339date}</updated>'
mimetype = 'application/atom+xml; charset={encoding}'
header = header.tmpl
changelog = changelog.tmpl
changelogentry = changelogentry.tmpl
filelog = filelog.tmpl
tags = tags.tmpl
tagentry = tagentry.tmpl
bookmarks = bookmarks.tmpl
bookmarkentry = bookmarkentry.tmpl
branches = branches.tmpl
branchentry = branchentry.tmpl
error = error.tmpl
filedifflink = '{file|escape}<br />'
fileellipses = '{file|escape}<br />'
filenodelink = '{file|escape}<br />'
filenolink = '{file|escape}<br />'