Remove old patch

Signed-off-by: Michel Alexandre Salim <salimma@fedoraproject.org>

libbpf-rs-downgrade-libbpf-sys.patch

@@ -1,25 +0,0 @@
-diff -Naur a/Cargo.toml b/Cargo.toml
---- a/Cargo.toml	2021-11-11 07:42:21.207106426 -0800
-+++ b/Cargo.toml	2021-11-11 07:42:30.520155695 -0800
-@@ -24,7 +24,7 @@
- version = "1.3"
- 
- [dependencies.libbpf-sys]
--version = "0.5.0-2"
-+version = "0.4.0-2"
- 
- [dependencies.nix]
- version = "0.22"
-diff -Naur a/src/object.rs b/src/object.rs
---- a/src/object.rs	1973-11-29 13:33:09.000000000 -0800
-+++ b/src/object.rs	2021-11-11 07:42:35.465181855 -0800
-@@ -67,9 +67,6 @@
-             pin_root_path: ptr::null(),
-             attach_prog_fd: 0,
-             kconfig: ptr::null(),
--            btf_custom_path: ptr::null(),
--            __bindgen_padding_0: <[u8; 6]>::default(),
--            __bindgen_padding_1: <[u8; 4]>::default(),
-         }
-     }
-