chore: satisfy the linter

Author: kaylendog

crates/matrix-sdk/src/room/futures.rs

@@ -443,12 +443,21 @@ impl<'a> IntoFuture for SendStateEventRaw<'a> {
     boxed_into_future!(extra_bounds: 'a);
 
     fn into_future(self) -> Self::IntoFuture {
+        #[cfg(feature = "e2e-encryption")]
         let Self { room, mut event_type, state_key, mut content, tracing_span, request_config } =
             self;
 
+        // This is here purely to satisfy the linter on non-encrypting targets.
+        #[cfg(not(feature = "e2e-encryption"))]
+        let Self { room, event_type, state_key, content, tracing_span, request_config } = self;
+
         let fut = async move {
             room.ensure_room_joined()?;
+
+            #[cfg(feature = "e2e-encryption")]
             let mut state_key = state_key.to_owned();
+            #[cfg(not(feature = "e2e-encryption"))]
+            let state_key = state_key.to_owned();
 
             #[cfg(feature = "e2e-encryption")]
             if Self::should_encrypt(room, event_type) {