systick: moved SysTickFrequencyCapability to systick.rs

arch/cortex-m/src/systick.rs

@@ -5,13 +5,16 @@
 //! ARM Cortex-M SysTick peripheral.
 
 use core::cell::Cell;
-use kernel::capabilities::SysTickFrequencyCapability;
 use kernel::utilities::registers::interfaces::{Readable, Writeable};
 use kernel::utilities::registers::{register_bitfields, FieldValue, ReadOnly, ReadWrite};
 use kernel::utilities::StaticRef;
 
 use core::num::NonZeroU32;
 
+/// The `SysTickFrequencyCapability` allows the holder to change the Cortex M
+/// SysTick `hertz` field.
+pub unsafe trait SysTickFrequencyCapability {}
+
 #[repr(C)]
 struct SystickRegisters {
     syst_csr: ReadWrite<u32, ControlAndStatus::Register>,

kernel/src/capabilities.rs

@@ -117,7 +117,3 @@ pub unsafe trait CreatePortTableCapability {}
 /// A capsule would never hold this capability although it may hold
 /// capabilities created via this capability.
 pub unsafe trait NetworkCapabilityCreationCapability {}
-
-/// The `SysTickFrequencyCapability` allows the holder to change the Cortex M
-/// SysTick `hertz` field.
-pub unsafe trait SysTickFrequencyCapability {}