Remove unused SchemeNamespace type

src/context/context.rs

@@ -18,7 +18,7 @@ use crate::{
     memory::{allocate_p2frame, deallocate_p2frame, Enomem, Frame, RaiiFrame},
     paging::{RmmA, RmmArch},
     percpu::PercpuBlock,
-    scheme::{CallerCtx, FileHandle, SchemeId, SchemeNamespace},
+    scheme::{CallerCtx, FileHandle, SchemeId},
     sync::CleanLockToken,
     syscall::usercopy::UserSliceRw,
 };

src/main.rs

@@ -55,7 +55,7 @@ extern crate bitflags;
 
 use core::sync::atomic::{AtomicU32, Ordering};
 
-use crate::{context::switch::SwitchResult, scheme::SchemeNamespace};
+use crate::context::switch::SwitchResult;
 
 use crate::consts::*;
 

src/scheme/mod.rs

@@ -92,9 +92,6 @@ pub mod user;
 /// Limit on number of schemes
 pub const SCHEME_MAX_SCHEMES: usize = 65_536;
 
-// Unique identifier for a scheme namespace.
-int_like!(SchemeNamespace, AtomicSchemeNamespace, usize, AtomicUsize);
-
 // Unique identifier for a scheme.
 int_like!(SchemeId, usize);