meta: Drop swabber

swabber hasn't been used in years and never did work well in the first
place. Remove its recipes, class and configuration.

(From OE-Core rev: e18657df0b7e45a224fae17e68c447eae94258ac)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/swabber-strace-attach

@@ -1,31 +0,0 @@
-#!/usr/bin/env python3
-import os
-import sys
-import subprocess
-
-# Detach from the controlling terminal and parent process by forking twice to daemonize ourselves,
-# then run the command passed as argv[1]. Send log data to argv[2].
-
-pid = os.fork()
-if (pid == 0):
-    os.setsid()
-    pid = os.fork()
-    if (pid != 0):
-        os._exit(0)
-else:
-    sys.exit()
-
-
-si = open(os.devnull, 'r')
-so = open(sys.argv[2], 'w')
-se = so
-
-# Replace those fds with our own
-os.dup2(si.fileno(), sys.stdin.fileno())
-os.dup2(so.fileno(), sys.stdout.fileno())
-os.dup2(se.fileno(), sys.stderr.fileno())
-
-ret = subprocess.call(sys.argv[1], shell=True)
-
-os._exit(ret)
-