Set MSRV to 1.75, remove #[async_trait] declarations whenever possible

Axum still uses `async_trait`, let them do whatever they want. I will
no longer be subject to the humiliation of trying to dig through
lifetime errors and unreadable declarations. Also I don't fucking care
about MSRV, I'm not a library. If you don't have modern Rust, get one.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/indieauth/backend/fs.rs b/src/indieauth/backend/fs.rs
index ce519da..f74fbbc 100644
--- a/src/indieauth/backend/fs.rs
+++ b/src/indieauth/backend/fs.rs
@@ -1,7 +1,6 @@
 use std::{path::PathBuf, collections::HashMap, borrow::Cow, time::{SystemTime, Duration}};
 
 use super::{AuthBackend, Result, EnrolledCredential};
-use async_trait::async_trait;
 use kittybox_indieauth::{
     AuthorizationRequest, TokenData
 };
@@ -186,7 +185,6 @@ impl FileBackend {
     }
 }
 
-#[async_trait]
 impl AuthBackend for FileBackend {
     async fn new(path: &'_ url::Url) -> Result<Self> {
         let orig_path = path;