axum-extra: Make axum optional dependency (#3485)

axum-extra/src/extract/cookie/mod.rs

@@ -2,7 +2,7 @@
 //!
 //! See [`CookieJar`], [`SignedCookieJar`], and [`PrivateCookieJar`] for more details.
 
-use axum::{
+use axum_core::{
     extract::FromRequestParts,
     response::{IntoResponse, IntoResponseParts, Response, ResponseParts},
 };

axum-extra/src/extract/cookie/private.rs

@@ -1,5 +1,5 @@
 use super::{cookies_from_request, set_cookies, Cookie, Key};
-use axum::{
+use axum_core::{
     extract::{FromRef, FromRequestParts},
     response::{IntoResponse, IntoResponseParts, Response, ResponseParts},
 };

axum-extra/src/extract/cookie/signed.rs

@@ -1,5 +1,5 @@
 use super::{cookies_from_request, set_cookies};
-use axum::{
+use axum_core::{
     extract::{FromRef, FromRequestParts},
     response::{IntoResponse, IntoResponseParts, Response, ResponseParts},
 };