The test was flaky and was disabled here
https://github.com/paritytech/polkadot-sdk/issues/6345, looked at the
flakiness
https://github.com/paritytech/polkadot-sdk/issues/6345#issuecomment-2674063608
and it wasn't because of some bug in our production code, but because of
the way the test interacts with the infrastructure.

Since https://github.com/paritytech/polkadot-sdk/pull/7504 this test is
now testing redundant things that other tests like
0009-approval-voting-coalescing.toml and 0006-parachains-max-tranche0
already cover, so instead of investing trying to fix it, just remove it.

Fixes: https://github.com/paritytech/polkadot-sdk/issues/6345

Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>