remove unneeded patches

Signed-off-by: James Strong <strong.james.e@gmail.com>

images/nginx/rootfs/patches/nginx-1.21.4-hash_overflow.patch

@@ -1,20 +0,0 @@
-# HG changeset patch
-# User Yichun Zhang <agentzh@gmail.com>
-# Date 1412276417 25200
-#      Thu Oct 02 12:00:17 2014 -0700
-# Node ID 4032b992f23b054c1a2cfb0be879330d2c6708e5
-# Parent  1ff0f68d9376e3d184d65814a6372856bf65cfcd
-Hash: buffer overflow might happen when exceeding the pre-configured limits.
-
-diff -r 1ff0f68d9376 -r 4032b992f23b src/core/ngx_hash.c
---- a/src/core/ngx_hash.c	Tue Sep 30 15:50:28 2014 -0700
-+++ b/src/core/ngx_hash.c	Thu Oct 02 12:00:17 2014 -0700
-@@ -312,6 +312,8 @@ ngx_hash_init(ngx_hash_init_t *hinit, ng
-         continue;
-     }
- 
-+    size--;
-+
-     ngx_log_error(NGX_LOG_WARN, hinit->pool->log, 0,
-                   "could not build optimal %s, you should increase "
-                   "either %s_max_size: %i or %s_bucket_size: %i; "