Keep -vet happy

core/sync/sync.odin

@@ -1,7 +1,6 @@
 package sync
 
 import "intrinsics"
-import "core:runtime"
 
 cpu_relax :: #force_inline proc "contextless" () {
 	intrinsics.cpu_relax();

core/sync/sync2/extended.odin

@@ -1,7 +1,5 @@
 package sync2
 
-import "core:runtime"
-
 // A Wait_Group waits for a collection of threads to finish
 //
 // A Wait_Group must not be copied after first use

core/sync/sync2/primitives_atomic.odin

@@ -1,7 +1,6 @@
 package sync2
 
 import "core:time"
-import "core:runtime"
 
 Atomic_Mutex_State :: enum i32 {
 	Unlocked = 0,