refactor(interledger-service-util): redundant_field_names lints produced from previous fixes

Signed-off-by: Ömer Talha Özdemir <omertoast@gmail.com>

Author: omertoast

crates/interledger-service-util/src/echo_service.rs

@@ -289,7 +289,7 @@ mod echo_tests {
             assert_eq!(request.prepare.destination(), destination);
             assert_eq!(request.prepare.data(), &data[..]);
             Ok(FulfillBuilder {
-                fulfillment: fulfillment,
+                fulfillment,
                 data,
             }
             .build())
@@ -335,7 +335,7 @@ mod echo_tests {
             assert_eq!(request.prepare.destination(), dest);
             assert_eq!(request.prepare.data(), &data[..]);
             Ok(FulfillBuilder {
-                fulfillment: fulfillment,
+                fulfillment,
                 data: &[],
             }
             .build())
@@ -381,7 +381,7 @@ mod echo_tests {
             assert_eq!(request.prepare.destination(), source_address);
             assert_eq!(request.prepare.data(), &data[..]);
             Ok(FulfillBuilder {
-                fulfillment: fulfillment,
+                fulfillment,
                 data,
             }
             .build())