Remove target_os = "hermit" checks

src/arch/aarch64/kernel/mod.rs

src/arch/mod.rs

src/arch/x86_64/kernel/apic.rs

src/arch/x86_64/kernel/irq.rs

src/arch/x86_64/kernel/mod.rs

src/arch/x86_64/kernel/percore.rs

src/arch/x86_64/kernel/processor.rs

src/arch/x86_64/kernel/scheduler.rs

src/console.rs

src/lib.rs

src/mm/allocator.rs

src/mm/freelist.rs

src/mm/hole.rs

src/mm/mod.rs

src/mm/test.rs

src/runtime_glue.rs

src/syscalls/interfaces/uhyve.rs

src/syscalls/mod.rs