get rid of rust version

the rust version causes errors. You'll need at least rust version 1.70 to have stable compiling

Author: GueLaKais

rclrs/Cargo.toml

@@ -6,7 +6,6 @@ authors = ["Esteve Fernandez <[email protected]>", "Nikolai Morin <nnmmgit@gmail
 edition = "2021"
 license = "Apache-2.0"
 description = "A ROS 2 client library for developing robotics applications in Rust"
-rust-version = "1.63"
 
 [lib]
 path = "src/lib.rs"