Revert "fetch: increase test coverage of fetches"

This reverts commit 2a0cafd464,
as it expects a working "a ref deletion must produce a single
transaction, not one for loose and another for packed" topic,
which we do not have.

t/t5503-tagfollow.sh

@@ -160,68 +160,4 @@ test_expect_success 'new clone fetch main and tags' '
 	test_cmp expect actual
 '
 
-test_expect_success 'atomic fetch with failing backfill' '
-	git init clone3 &&
-
-	# We want to test whether a failure when backfilling tags correctly
-	# aborts the complete transaction when `--atomic` is passed: we should
-	# neither create the branch nor should we create the tag when either
-	# one of both fails to update correctly.
-	#
-	# To trigger failure we simply abort when backfilling a tag.
-	test_hook -C clone3 reference-transaction <<-\EOF &&
-		while read oldrev newrev reference
-		do
-			if test "$reference" = refs/tags/tag1
-			then
-				exit 1
-			fi
-		done
-	EOF
-
-	test_must_fail git -C clone3 fetch --atomic .. $B:refs/heads/something &&
-	test_must_fail git -C clone3 rev-parse --verify refs/heads/something &&
-	test_must_fail git -C clone3 rev-parse --verify refs/tags/tag2
-'
-
-test_expect_success 'atomic fetch with backfill should use single transaction' '
-	git init clone4 &&
-
-	# Fetching with the `--atomic` flag should update all references in a
-	# single transaction, including backfilled tags. We thus expect to see
-	# a single reference transaction for the created branch and tags.
-	cat >expected <<-EOF &&
-		prepared
-		$ZERO_OID $B refs/heads/something
-		$ZERO_OID $S refs/tags/tag2
-		$ZERO_OID $T refs/tags/tag1
-		committed
-		$ZERO_OID $B refs/heads/something
-		$ZERO_OID $S refs/tags/tag2
-		$ZERO_OID $T refs/tags/tag1
-	EOF
-
-	test_hook -C clone4 reference-transaction <<-\EOF &&
-		( echo "$*" && cat ) >>actual
-	EOF
-
-	git -C clone4 fetch --atomic .. $B:refs/heads/something &&
-	test_cmp expected clone4/actual
-'
-
-test_expect_success 'backfill failure causes command to fail' '
-	git init clone5 &&
-
-	# Create a tag that is nested below the tag we are about to fetch via
-	# the backfill mechanism. This causes a D/F conflict when backfilling
-	# and should thus cause the command to fail.
-	empty_blob=$(git -C clone5 hash-object -w --stdin </dev/null) &&
-	git -C clone5 update-ref refs/tags/tag1/nested $empty_blob &&
-
-	test_must_fail git -C clone5 fetch .. $B:refs/heads/something &&
-	test $B = $(git -C clone5 rev-parse --verify refs/heads/something) &&
-	test $S = $(git -C clone5 rev-parse --verify tag2) &&
-	test_must_fail git -C clone5 rev-parse --verify tag1
-'
-
 test_done

t/t5510-fetch.sh

@@ -343,35 +343,6 @@ test_expect_success 'fetch --atomic --append appends to FETCH_HEAD' '
 	test_cmp expected atomic/.git/FETCH_HEAD
 '
 
-test_expect_success 'fetch --atomic --prune executes a single reference transaction only' '
-	test_when_finished "rm -rf \"$D\"/atomic" &&
-
-	cd "$D" &&
-	git branch scheduled-for-deletion &&
-	git clone . atomic &&
-	git branch -D scheduled-for-deletion &&
-	git branch new-branch &&
-	head_oid=$(git rev-parse HEAD) &&
-
-	# Fetching with the `--atomic` flag should update all references in a
-	# single transaction.
-	cat >expected <<-EOF &&
-		prepared
-		$ZERO_OID $ZERO_OID refs/remotes/origin/scheduled-for-deletion
-		$ZERO_OID $head_oid refs/remotes/origin/new-branch
-		committed
-		$ZERO_OID $ZERO_OID refs/remotes/origin/scheduled-for-deletion
-		$ZERO_OID $head_oid refs/remotes/origin/new-branch
-	EOF
-
-	test_hook -C atomic reference-transaction <<-\EOF &&
-		( echo "$*" && cat ) >>actual
-	EOF
-
-	git -C atomic fetch --atomic --prune origin &&
-	test_cmp expected atomic/actual
-'
-
 test_expect_success '--refmap="" ignores configured refspec' '
 	cd "$TRASH_DIRECTORY" &&
 	git clone "$D" remote-refs &&