remove dead Pic struct after PIC state machine elimination

The PIC state machine (~130 lines) was eliminated in a1b628e in favor
of hardcoded vector 0x20 + no-op PIC port handling. The pic.rs module
is now unused and produces 7 dead_code warnings. Remove it.

Signed-off-by: danbugs <danilochiarlone@gmail.com>

Author: danbugs

src/hyperlight_host/src/hypervisor/mod.rs

@@ -38,9 +38,6 @@ pub(crate) mod crashdump;
 
 pub(crate) mod hyperlight_vm;
 
-#[cfg(all(feature = "hw-interrupts", any(mshv3, target_os = "windows")))]
-pub(crate) mod pic;
-
 use std::fmt::Debug;
 #[cfg(any(kvm, mshv3))]
 use std::sync::atomic::{AtomicBool, AtomicU8, AtomicU64, Ordering};