Remove some dead code from sgx

Author: oli-obk

src/libstd/sys/sgx/abi/mem.rs

@@ -34,13 +34,6 @@ fn image_base() -> u64 {
     base
 }
 
-pub fn is_enclave_range(p: *const u8, len: usize) -> bool {
-    let start=p as u64;
-    let end=start + (len as u64);
-    start >= image_base() &&
-        end <= image_base() + (unsafe { ENCLAVE_SIZE } as u64) // unsafe ok: link-time constant
-}
-
 pub fn is_user_range(p: *const u8, len: usize) -> bool {
     let start=p as u64;
     let end=start + (len as u64);

src/libstd/sys/sgx/abi/usercalls/mod.rs

@@ -33,14 +33,6 @@ pub fn read(fd: Fd, buf: &mut [u8]) -> IoResult<usize> {
     }
 }
 
-pub fn read_alloc(fd: Fd) -> IoResult<Vec<u8>> {
-    unsafe {
-        let mut userbuf = alloc::User::<ByteBuffer>::uninitialized();
-        raw::read_alloc(fd, userbuf.as_raw_mut_ptr()).from_sgx_result()?;
-        Ok(copy_user_buffer(&userbuf))
-    }
-}
-
 pub fn write(fd: Fd, buf: &[u8]) -> IoResult<usize> {
     unsafe {
         let userbuf = alloc::User::new_from_enclave(buf);