fix(router): Convert ephemeral to client secret auth list payment_method_customer (#1602)

Co-authored-by: Sahkal Poddar <sahkal.poddar@juspay.in>
Co-authored-by: Abhishek Marrivagu <68317979+Abhicodes-crypto@users.noreply.github.com>
Co-authored-by: Narayan Bhat <48803246+Narayanbhat166@users.noreply.github.com>

crates/router/src/services/authentication.rs

@@ -422,7 +422,6 @@ where
         }
         .into());
     }
-
     Ok((Box::new(ApiKeyAuth), api::AuthFlow::Merchant))
 }