Revert "matrix_sdk examples: set #![type_length_limit = "1075569"]"

This reverts commit 7d023eb.

Rust 1.47.0 got released and the tuning is no longer necessary.

Author: martinetd

matrix_sdk/examples/command_bot.rs

@@ -1,7 +1,3 @@
-// allow biggr types until rustc fix, consider removing after new rust
-// stable release. see https://github.com/rust-lang/rust/issues/54540
-#![type_length_limit = "1075569"]
-
 use std::{env, process::exit};
 
 use matrix_sdk::{

matrix_sdk/examples/image_bot.rs

@@ -1,7 +1,3 @@
-// allow biggr types until rustc fix, consider removing after new rust
-// stable release. see https://github.com/rust-lang/rust/issues/54540
-#![type_length_limit = "1075569"]
-
 use std::{
     env,
     fs::File,