remove choice lock + Cargo.toml fillups

Cargo.toml

@@ -4,6 +4,10 @@ version = "1.0.0"
 authors = ["Ales Katona <almindor@gmail.com>"]
 edition = "2018"
 license = "LGPLv3"
+repository = "https://gitlab.bitsmart.ltd/open/prongs.git"
+documentation = "https://doc.bitsmart.ltd/prongs"
+homepage = "https://gitlab.bitsmart.ltd/open"
+description = "Input handling schema written in rust. Backend agnostic, provides serializability, assignment and unified interface for working with inputs. Keyboard, mouse and controllers supported."
 
 [dependencies]
 bitflags = "1.0.4"

src/lib.rs

@@ -4,10 +4,6 @@ use crate::types::{InputCause, InputTypeFlags, ProcessingResult};
 
 pub mod types;
 
-// error out specifically if no backend is chosen
-#[cfg(not(any(feature="backend_piston", feature="backend_gilrs")))]
-compile_error!("No backend selected, use features=<backend> in Cargo.toml or --features <backend> when building directly.");
-
 #[cfg(feature="backend_piston")]
 pub mod backend_piston;
 #[cfg(feature="backend_gilrs")]