Remove some now redundant unwrap() calls

src/models/fueltank.rs

@@ -58,7 +58,7 @@ pub async fn croak() -> ManifoldResult<Vec<Tip>> {
     let client = Client::new();
     result = client.get("https://frog.tips/api/1/tips/")
         .header(CONTENT_TYPE, "application/json")
-        .send().await.unwrap().json().await.unwrap();
+        .send().await?.json().await?;
 
     debug!("Result: {:?}", &result);