Fix CI: remove unused imports when building without unwind

Author: the-ssd

cranelift/codegen/src/isa/aarch64/mod.rs

@@ -5,9 +5,13 @@ use crate::ir::{self, Function, Type};
 use crate::isa::aarch64::settings as aarch64_settings;
 #[cfg(feature = "unwind")]
 use crate::isa::unwind::systemv;
+#[cfg(feature = "unwind")]
+use crate::machinst::CompiledCode;
+#[cfg(feature = "unwind")]
+use target_lexicon::OperatingSystem;
 use crate::isa::{Builder as IsaBuilder, FunctionAlignment, IsaFlagsHashKey, TargetIsa};
 use crate::machinst::{
-    CompiledCode, CompiledCodeStencil, MachInst, MachTextSectionBuilder, Reg, SigSet,
+    CompiledCodeStencil, MachInst, MachTextSectionBuilder, Reg, SigSet,
     TextSectionBuilder, VCode, compile,
 };
 use crate::result::CodegenResult;
@@ -16,7 +20,7 @@ use alloc::string::String;
 use alloc::{boxed::Box, vec::Vec};
 use core::fmt;
 use cranelift_control::ControlPlane;
-use target_lexicon::{Aarch64Architecture, Architecture, OperatingSystem, Triple};
+use target_lexicon::{Aarch64Architecture, Architecture, Triple};
 
 // New backend:
 mod abi;