style(exec_enclave): fix clippy lint errors on sample functions

rtc_exec_enclave/src/lib.rs

@@ -23,7 +23,7 @@ pub struct Token {
     binary_hash: [u8; 32],
 }
 
-pub unsafe fn request_execution(token: Token, _params: ()) -> Result<Box<[u8]>, ()> {
+pub fn request_execution(token: Token, _params: ()) -> Result<Box<[u8]>, ()> {
     let exec_module = match get_module_by_id(token.binary_hash) {
         Some(val) => val,
         None => return Err(()),
@@ -47,7 +47,7 @@ pub unsafe fn request_execution(token: Token, _params: ()) -> Result<Box<[u8]>,
 // XXX: This is placeholder until we completed the data retrieval flow and know what values
 // we need to pass through to the data enclave
 fn get_data(_token: &Token) -> Box<[u8]> {
-    return vec![123; 43].into_boxed_slice();
+    vec![123; 43].into_boxed_slice()
 }
 
 // XXX: The implementation is only for the sample functions currently

rtc_exec_enclave/src/sample_functions.rs

@@ -65,7 +65,7 @@ fn median(data: &mut [f64]) -> Option<f64> {
 
 fn mean(data: &mut [f64]) -> Option<f64> {
     // If len is 0 we cannot calculate a mean
-    if data.len() == 0 {
+    if data.is_empty() {
         None
     } else {
         let sum: f64 = data.iter().sum();