devices: remove unused code

On-behalf-of: SAP philipp.schuster@sap.com
Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>

devices/src/interrupt_controller.rs

@@ -54,25 +54,6 @@ pub enum Error {
 
 type Result<T> = result::Result<T, Error>;
 
-pub struct MsiMessage {
-    // Message Address Register
-    //   31-20: Base address. Fixed value (0x0FEE)
-    //   19-12: Destination ID
-    //   11-4:  Reserved
-    //   3:     Redirection Hint indication
-    //   2:     Destination Mode
-    //   1-0:   Reserved
-    pub addr: u32,
-    // Message Data Register
-    //   32-16: Reserved
-    //   15:    Trigger Mode. 0 = Edge, 1 = Level
-    //   14:    Level. 0 = Deassert, 1 = Assert
-    //   13-11: Reserved
-    //   10-8:  Delivery Mode
-    //   7-0:   Vector
-    pub data: u32,
-}
-
 // Introduce trait InterruptController to uniform the interrupt
 // service provided for devices.
 // Device manager uses this trait without caring whether it is a