Fix warnings

Author: mssun

examples/authentication/ta/src/main.rs

@@ -161,7 +161,7 @@ pub fn decrypt_final(digest: &mut AEOp, params: &mut Parameters) -> Result<()> {
 
     match digest.op.decrypt_final(&clear, &mut ciph, &tag) {
         Err(e) => Err(e),
-        Ok((_clear_len)) => {
+        Ok(_clear_len) => {
             p0.buffer().copy_from_slice(&clear);
             p1.buffer().copy_from_slice(&ciph);
             p2.buffer().copy_from_slice(&tag);

examples/diffie_hellman/ta/src/main.rs

@@ -17,7 +17,6 @@
 
 #![no_main]
 
-use optee_utee::BigInt;
 use optee_utee::{
     ta_close_session, ta_create, ta_destroy, ta_invoke_command, ta_open_session, trace_println,
 };

examples/random/host/src/main.rs

@@ -15,7 +15,7 @@
 // specific language governing permissions and limitations
 // under the License.
 
-use optee_teec::{Context, Operation, ParamNone, ParamTmpRef, ParamType, Session, Uuid};
+use optee_teec::{Context, Operation, ParamNone, ParamTmpRef, Session, Uuid};
 use proto::{Command, UUID};
 
 fn random(session: &mut Session) -> optee_teec::Result<()> {

examples/secure_storage/host/src/main.rs

@@ -15,7 +15,7 @@
 // specific language governing permissions and limitations
 // under the License.
 
-use optee_teec::{Context, ErrorKind, Operation, ParamNone, ParamTmpRef, ParamType, Session, Uuid};
+use optee_teec::{Context, ErrorKind, Operation, ParamNone, ParamTmpRef, Session, Uuid};
 use proto::{Command, UUID};
 use std::ffi::CString;
 

examples/serde/host/src/main.rs

@@ -15,7 +15,7 @@
 // specific language governing permissions and limitations
 // under the License.
 
-use optee_teec::{Context, Operation, ParamNone, ParamTmpRef, ParamType, Session, Uuid};
+use optee_teec::{Context, Operation, ParamNone, ParamTmpRef, Session, Uuid};
 use serde::Deserialize;
 use proto::{UUID, Command};