style: fix some clippy errors

src/route/contact/errors.rs

@@ -268,7 +268,7 @@ mod tests {
 
     #[test]
     fn from_validation_errors_with_name_error() {
-        use validator::{Validate, ValidationError};
+        use validator::Validate;
 
         #[derive(Validate)]
         struct TestStruct {

src/route/contact/mod.rs

@@ -933,7 +933,7 @@ mod tests {
         assert!(result.is_err());
         match result.unwrap_err() {
             ContactError::CouldNotParseSettingsEmail(_) => (),
-            e => panic!("Expected CouldNotParseSettingsEmail, got {:?}", e),
+            e => panic!("Expected CouldNotParseSettingsEmail, got {e:?}"),
         }
     }
 
@@ -964,7 +964,7 @@ mod tests {
         assert!(result.is_err());
         match result.unwrap_err() {
             ContactError::CouldNotParseRequestEmailAddress(_) => (),
-            e => panic!("Expected CouldNotParseRequestEmailAddress, got {:?}", e),
+            e => panic!("Expected CouldNotParseRequestEmailAddress, got {e:?}"),
         }
     }
 
@@ -996,7 +996,7 @@ mod tests {
         assert!(result.is_err());
         match result.unwrap_err() {
             ContactError::CouldNotSendEmail(_) => (),
-            e => panic!("Expected CouldNotSendEmail, got {:?}", e),
+            e => panic!("Expected CouldNotSendEmail, got {e:?}"),
         }
     }
 }