remove unused "mask" code

crsn_stdio/src/lib.rs

@@ -6,7 +6,6 @@ use crsn::module::{CrsnExtension, ParseRes, CrsnUniq};
 use crsn::runtime::fault::Fault;
 use crsn::runtime::run_thread::{RunState};
 use crsn::sexp::SourcePosition;
-use crsn::asm::data::Mask;
 use std::io::{Write};
 use std::convert::TryFrom;
 use crsn::asm::instr::Cond;
@@ -66,7 +65,7 @@ impl CrsnExtension for StdioOps {
     }
 
     /// Run-time method called to read an object (using the object handle syntax)
-    fn read_obj(&self, state: &mut RunState, handle: Value, _mask: Mask)
+    fn read_obj(&self, state: &mut RunState, handle: Value)
                 -> Result<Option<Value>, Fault>
     {
         if handle == self.hdl_stdin {
@@ -82,7 +81,7 @@ impl CrsnExtension for StdioOps {
     }
 
     /// Run-time method called to write an object (using the object handle syntax)
-    fn write_obj(&self, state: &mut RunState, handle: Value, _mask: Mask, value: Value) -> Result<Option<()>, Fault>
+    fn write_obj(&self, state: &mut RunState, handle: Value, value: Value) -> Result<Option<()>, Fault>
     {
         state.clear_status();