fix: Remove incorrect cfg(not(windows)) export for windows sandbox

The windows module only exists on Windows, cannot be exported on other platforms.

Co-authored-by: factory-droid[bot] <138933559+factory-droid[bot]@users.noreply.github.com>

Author: Cortex Dev

cortex-engine/src/sandbox/mod.rs

@@ -29,6 +29,3 @@ pub use runner::{SandboxBackend, SandboxRunner, SandboxedCommand, get_platform_s
 // Platform-specific exports
 #[cfg(target_os = "windows")]
 pub use windows::{apply_windows_sandbox, get_capabilities_info, spawn_sandboxed_process};
-
-#[cfg(not(target_os = "windows"))]
-pub use windows::{apply_windows_sandbox, get_capabilities_info, spawn_sandboxed_process};