build: remove redundant TODO in configure

Remove a redundant TODO in configure:
"# TODO(srl295): EBCDIC should be 'e'"
as there is no plan to support EBCDIC systems any time soon.

Refs: https://github.com/nodejs/node/issues/4607
PR-URL: https://github.com/nodejs/node/pull/5080
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Rich Trott <rtrott@gmail.com>

configure

@@ -1050,7 +1050,7 @@ def configure_intl(o):
   if not icu_ver_major:
     print ' Could not read U_ICU_VERSION_SHORT version from %s' % uvernum_h
     sys.exit(1)
-  icu_endianness = sys.byteorder[0];  # TODO(srl295): EBCDIC should be 'e'
+  icu_endianness = sys.byteorder[0];
   o['variables']['icu_ver_major'] = icu_ver_major
   o['variables']['icu_endianness'] = icu_endianness
   icu_data_file_l = 'icudt%s%s.dat' % (icu_ver_major, 'l')