fixed clippy issues

time_tracker/src/main.rs

@@ -145,10 +145,8 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                 now.day(),
                 now.year()
             ));
-        } else {
-            if line != "" {
+        } else if !line.is_empty() {
                 body_content.push(line.to_string());
-            }
         }
         checked.retain(|val| val != &item);
     }