git-pull: do not mention --quiet and --verbose twice

git-pull.txt includes fetch-options.txt and merge-options.txt, both of
which document the --quiet and --verbose.

Supress the ones from fetch-options.txt.
Signed-off-by: NEmmanuel Trillaud <etrillaud@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/fetch-options.txt

+ifndef::git-pull[]
 -q::
 --quiet::
 	Pass --quiet to git-fetch-pack and silence any other internally
@@ -6,6 +7,7 @@
 -v::
 --verbose::
 	Be verbose.
+endif::git-pull[]
 
 -a::
 --append::