request-pull: drop old USAGE stuff

request-pull uses OPTIONS_SPEC, so no need for (meanwhile incomplete)
USAGE and LONG_USAGE anymore.

Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-request-pull.sh

@@ -4,9 +4,6 @@
 # This file is licensed under the GPL v2, or a later version
 # at the discretion of Linus Torvalds.
 
-USAGE='<start> <url> [<end>]'
-LONG_USAGE='Summarizes the changes between two commits to the standard output,
-and includes the given URL in the generated summary.'
 SUBDIRECTORY_OK='Yes'
 OPTIONS_KEEPDASHDASH=
 OPTIONS_STUCKLONG=