tests: Really split run-copymany-sections.sh into separate tests

tests: Really split run-copymany-sections.sh into separate tests

The previous commit 4fac1627c "tests: Split run-copymany-sections.sh
into separate tests" duplicated the tests because they were still
also done in the new test-copymany-subr.sh. Remove them really this
time. Also don't source test-subr.sh twice, test-copymany-subr.sh
already sources it, so the subtests don't have to also do it again.

	* tests/test-copymany-subr.sh: Remove actual tests.
	* tests/run-copymany-be32.sh: Remove . $srcdir/test-subr.sh.
	* tests/run-copymany-be64.sh: Likewise.
	* tests/run-copymany-le32.sh: Likewise.
	* tests/run-copymany-le64.sh: Likewise.

Signed-off-by: Mark Wielaard <mark@klomp.org>