vmm: stop removing the UNIX socket file

When doing a local migration using a UNIX socket, we removed the UNIX
socket file after accepting the connection. The VMM does not own this
socket file, which makes this an unsafe operation. Thus, we stop doing
that.

On-behalf-of: SAP sebastian.eydam@sap.com
Signed-off-by: Sebastian Eydam <sebastian.eydam@cyberus-technology.de>

vmm/src/migration_transport.rs

@@ -73,11 +73,6 @@ pub(crate) fn receive_migration_socket(
             ))
         })?;
 
-        // Remove the UNIX socket file after accepting the connection
-        std::fs::remove_file(&path).map_err(|e| {
-            MigratableError::MigrateReceive(anyhow!("Error removing UNIX socket file: {e}"))
-        })?;
-
         Ok(SocketStream::Unix(socket))
     }
 }