darwin.patch_cmds: remove code for macOS < 11

pkgs/os-specific/darwin/apple-source-releases/patch_cmds/meson.build.in

@@ -8,7 +8,6 @@ project('patch_cmds', 'c', version : '@version@')
 # Dependencies
 cc = meson.get_compiler('c')
 
-libbsd = dependency('libbsd-overlay', required : false)
 libutil = cc.find_library('util')
 
 
@@ -30,7 +29,6 @@ install_man('cmp/cmp.1')
 
 executable(
     'diff',
-    dependencies : [ libbsd ],
     include_directories : 'diff',
     install : true,
     sources : [
@@ -79,7 +77,6 @@ install_man('diffstat/diffstat.1')
 
 executable(
     'patch',
-    dependencies : [ libbsd ],
     include_directories : 'patch',
     install : true,
     sources : [
@@ -96,7 +93,6 @@ install_man('patch/patch.1')
 
 executable(
     'sdiff',
-    dependencies : [ libbsd ],
     include_directories : 'sdiff',
     install : true,
     sources : [

pkgs/os-specific/darwin/apple-source-releases/patch_cmds/package.nix

@@ -1,7 +1,6 @@
 {
   lib,
   apple-sdk,
-  libbsd,
   libutil,
   mkAppleDerivation,
   pkg-config,
@@ -19,10 +18,7 @@ mkAppleDerivation {
 
   nativeBuildInputs = [ pkg-config ];
 
-  buildInputs =
-    [ libutil ]
-    # diff, patch, and sdiff need `strtonum`, which requires the 11.0 SDK.
-    ++ lib.optionals (lib.versionOlder (lib.getVersion apple-sdk) "11.0") [ libbsd ];
+  buildInputs = [ libutil ];
 
   meta = {
     description = "BSD patch commands for Darwin";