tests: drop prereq `PREPARE_FOR_MAIN_BRANCH` where no longer needed

We introduced the `PREPARE_FOR_MAIN_BRANCH` prereq for the sole purpose
of allowing us to perform the non-trivial adjustments regarding the
`master` -> `main` rename before the automatable ones.

Now that the transition is almost complete, we can stop using it in most
instances. The only two exceptions are t5526 and t9902: at the time of
writing, there are other patches in flight that touch these test
scripts, therefore their transition to `main` is postponed to a later
date.

This patch is the result of this command:

	sed -i 's/PREPARE_FOR_MAIN_BRANCH[ ,]//' t/t[0-9]*.sh &&
	git checkout HEAD -- t/t5526\* t/t9902\*

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/t/t3201-branch-contains.sh b/t/t3201-branch-contains.sh
index 8e626afbb9..f9f4d20e93 100755
--- a/t/t3201-branch-contains.sh
+++ b/t/t3201-branch-contains.sh
@@ -245,7 +245,7 @@ test_expect_success 'branch --merged combined with --no-merged' '
 # Here "topic" tracks "main" with one extra commit, and "zzz" points to the
 # same tip as main The name "zzz" must come alphabetically after "topic"
 # as we process them in that order.
-test_expect_success PREPARE_FOR_MAIN_BRANCH 'branch --merged with --verbose' '
+test_expect_success 'branch --merged with --verbose' '
 	git branch --track topic main &&
 	git branch zzz topic &&
 	git checkout topic &&