Remove unused patch

Signed-off-by: Tomas Hozza <thozza@redhat.com>

unbound-1.5.0-arc4random-race-condition.patch

@@ -1,30 +0,0 @@
-From b4200f7e7ac1ca4a315df84e92cd31d8ba423cee Mon Sep 17 00:00:00 2001
-From: wouter <wouter@be551aaa-1e26-0410-a405-d3ace91eadb9>
-Date: Fri, 21 Nov 2014 08:22:18 +0000
-Subject: [PATCH] - Fix crash on multiple thread random usage on systems
- without   arc4random.
-
-git-svn-id: http://unbound.nlnetlabs.nl/svn/trunk@3277 be551aaa-1e26-0410-a405-d3ace91eadb9
----
- compat/arc4_lock.c | 4 +++-
- 2 files changed, 7 insertions(+), 1 deletion(-)
-
-diff --git a/compat/arc4_lock.c b/compat/arc4_lock.c
-index ce8bb41..faa743d 100644
---- a/compat/arc4_lock.c
-+++ b/compat/arc4_lock.c
-@@ -53,8 +53,10 @@ static int arc4lockinit = 0;
- 
- void _ARC4_LOCK(void)
- {
--	if(!arc4lockinit)
-+	if(!arc4lockinit) {
-+		arc4lockinit = 1;
- 		lock_quick_init(&arc4lock);
-+	}
- 	lock_quick_lock(&arc4lock);
- }
- 
--- 
-1.9.3
-