Revert "check_mailq: try to autodetect which mailq implementation we are using"

This reverts commit bc4113fba2d251b70f8d9dae80f1b18033cace40.

plugins-scripts/check_mailq.pl

@@ -605,30 +605,7 @@ sub process_arguments(){
 			exit $ERRORS{'UNKNOWN'};
 		}
 	}else{
-		if (defined $utils::PATH_TO_QMAIL_QSTAT
-		    && -x $utils::PATH_TO_QMAIL_QSTAT)
-		{
-			$mailq = 'qmail';
-		}
-		elsif (-d '/var/lib/postfix' || -d '/var/local/lib/postfix'
-		       || -e '/usr/sbin/postfix' || -e '/usr/local/sbin/postfix')
-		{
-			$mailq = 'postfix';
-		}
-		elsif (-d '/usr/lib/exim4' || -d '/usr/local/lib/exim4'
-		       || -e '/usr/sbin/exim' || -e '/usr/local/sbin/exim')
-		{
-			$mailq = 'exim';
-		}
-		elsif (-d '/usr/lib/nullmailer' || -d '/usr/local/lib/nullmailer'
-		       || -e '/usr/sbin/nullmailer-send'
-		       || -e '/usr/local/sbin/nullmailer-send')
-		{
-			$mailq = 'nullmailer';
-		}
-		else {
-			$mailq = 'sendmail';
-		}
+		$mailq = 'sendmail' ;
 	}
 		
 	return $ERRORS{'OK'};