Get rid of failure: ra_lsp_server & ra_project_model

crates/ra_lsp_server/src/lib.rs

@@ -9,5 +9,5 @@ pub mod req;
 pub mod init;
 mod world;
 
-pub type Result<T> = ::std::result::Result<T, ::failure::Error>;
+pub type Result<T> = std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
 pub use crate::{caps::server_capabilities, main_loop::main_loop, main_loop::LspError, init::InitializationOptions};