tests: shell: remove check for reject from prerouting

It reports a failure with the following kernel patch:

 commit f53b9b0bdc59c0823679f2e3214e0d538f5951b9
 Author: Laura Garcia Liebana <nevola@gmail.com>
 Date:   Sun May 31 22:26:23 2020 +0200

    netfilter: introduce support for reject at prerouting stage

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/chains/0012reject_in_prerouting_1 b/tests/shell/testcases/chains/0012reject_in_prerouting_1
deleted file mode 100755 (executable)
index 0ee86c1..0000000
--- a/tests/shell/testcases/chains/0012reject_in_prerouting_1
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/bin/bash
-
-set -e
-
-$NFT add table t
-$NFT add chain t prerouting {type filter hook prerouting priority 0 \; }
-
-# wrong hook prerouting, only input/forward/output is valid
-$NFT add rule t prerouting reject 2>/dev/null || exit 0
-echo "E: accepted reject in prerouting hook" >&2
-exit 1