dead code cleanup, no-op

src/database/executors/mock.rs

@@ -85,10 +85,6 @@ impl DatabaseExecutor for MockExecutor {
     Ok("2026-03-10T00:00:00Z".to_string())
   }
 
-  fn is_mock(&self) -> bool {
-    true
-  }
-
   #[cfg(test)]
   fn get_queries(&self) -> Vec<String> {
     MOCK_STATE.with(|state| state.borrow().captured_queries.clone())

src/database/executors/mod.rs

@@ -20,11 +20,6 @@ pub trait DatabaseExecutor: Send + Sync {
   /// Returns the current transaction timestamp
   fn timestamp(&self) -> Result<String, String>;
 
-  /// Returns whether this is a mock executor (bypassing pg_catalog index checks)
-  fn is_mock(&self) -> bool {
-    false
-  }
-
   #[cfg(test)]
   fn get_queries(&self) -> Vec<String>;