move more deps to cap-std-sync, define own SystemTimeSpec

crates/wasi-c2/src/clocks.rs

@@ -1,34 +1,20 @@
-use cap_std::time::{Duration, Instant, MonotonicClock, SystemClock, SystemTime};
-use cap_time_ext::{MonotonicClockExt, SystemClockExt};
+use cap_std::time::{Duration, Instant, SystemTime};
+
+pub enum SystemTimeSpec {
+    SymbolicNow,
+    Absolute(SystemTime),
+}
 
 pub trait WasiSystemClock {
     fn resolution(&self) -> Duration;
     fn now(&self, precision: Duration) -> SystemTime;
 }
 
-impl WasiSystemClock for SystemClock {
-    fn resolution(&self) -> Duration {
-        SystemClockExt::resolution(self)
-    }
-    fn now(&self, precision: Duration) -> SystemTime {
-        self.now_with(precision)
-    }
-}
-
 pub trait WasiMonotonicClock {
     fn resolution(&self) -> Duration;
     fn now(&self, precision: Duration) -> Instant;
 }
 
-impl WasiMonotonicClock for MonotonicClock {
-    fn resolution(&self) -> Duration {
-        MonotonicClockExt::resolution(self)
-    }
-    fn now(&self, precision: Duration) -> Instant {
-        self.now_with(precision)
-    }
-}
-
 pub struct WasiClocks {
     pub system: Box<dyn WasiSystemClock>,
     pub monotonic: Box<dyn WasiMonotonicClock>,