Simplify zig test path

Author: jedisct1

build.zig

@@ -241,17 +241,9 @@ pub fn build(b: *std.Build) !void {
     const version_file_path = "include/sodium/version.h";
 
     if (is_zig_16) {
-        src_dir.access(io, version_file_path, .{}) catch {
-            try Dir.copyFile(cwd, prebuilt_version_file_path, src_dir, version_file_path, io, .{});
-        };
-    } else if (@hasField(Dir.OpenOptions, "follow_symlinks")) {
-        src_dir.access(version_file_path, .{ .read = true }) catch {
-            try cwd.copyFile(prebuilt_version_file_path, src_dir, version_file_path, .{});
-        };
+        try Dir.copyFile(cwd, prebuilt_version_file_path, src_dir, version_file_path, io, .{});
     } else {
-        src_dir.access(version_file_path, .{ .mode = .read_only }) catch {
-            try cwd.copyFile(prebuilt_version_file_path, src_dir, version_file_path, .{});
-        };
+        try cwd.copyFile(prebuilt_version_file_path, src_dir, version_file_path, .{});
     }
 
     for (libs.items) |lib| {