misc: Remove SGX support from Cloud Hypervisor

This commit removes the SGX support from cloud hypervisor. SGX support
was deprecated in May as part of #7090.

Signed-off-by: Shubham Chakrawar <schakrawar@crusoe.ai>

hypervisor/src/mshv/mod.rs

@@ -41,8 +41,6 @@ pub mod x86_64;
 // aarch64 dependencies
 #[cfg(target_arch = "aarch64")]
 pub mod aarch64;
-#[cfg(target_arch = "x86_64")]
-use std::fs::File;
 use std::os::unix::io::AsRawFd;
 #[cfg(target_arch = "aarch64")]
 use std::sync::Mutex;
@@ -1892,11 +1890,6 @@ impl vm::Vm for MshvVm {
         Ok(())
     }
 
-    #[cfg(target_arch = "x86_64")]
-    fn enable_sgx_attribute(&self, _file: File) -> vm::Result<()> {
-        Ok(())
-    }
-
     fn register_ioevent(
         &self,
         fd: &EventFd,