fix: remove no use codes. (#119)

05-01.zig

There are two lines of redundant code that need to be removed.

Author: xihale

assets/src/05-01.zig

@@ -11,8 +11,6 @@ pub fn main() !void {
     defer client.deinit();
 
     const uri = try std.Uri.parse("http://httpbin.org/headers");
-    const buf = try allocator.alloc(u8, 1024 * 8);
-    defer allocator.free(buf);
     var req = try client.request(.GET, uri, .{
         .extra_headers = &.{.{ .name = "Custom-header", .value = "Custom Value" }},
     });