[fuchsia] Remove now unsed wrapper for zx_clock_get (#25750)

shell/platform/fuchsia/dart-pkg/zircon/lib/src/system.dart

@@ -190,7 +190,6 @@ class System extends NativeFieldWrapperClass2 {
 
   // Time operations.
   static int clockGetMonotonic() native 'System_ClockGetMonotonic';
-  static int clockGet(int clockId) native 'System_ClockGet';
 
   // TODO(edcoyne): Remove this, it is required to safely do an API transition across repos.
   static int reboot() { return -2; /*ZX_ERR_NOT_SUPPORTED*/ }

shell/platform/fuchsia/dart-pkg/zircon/sdk_ext/system.cc

@@ -463,12 +463,6 @@ uint64_t System::ClockGetMonotonic() {
   return zx_clock_get_monotonic();
 }
 
-uint64_t System::ClockGet(uint32_t clock_id) {
-  zx_time_t result = 0;
-  zx_clock_get(clock_id, &result);
-  return result;
-}
-
 // clang-format: off
 
 #define FOR_EACH_STATIC_BINDING(V) \
@@ -488,8 +482,7 @@ uint64_t System::ClockGet(uint32_t clock_id) {
   V(System, VmoRead)               \
   V(System, VmoWrite)              \
   V(System, VmoMap)                \
-  V(System, ClockGetMonotonic)     \
-  V(System, ClockGet)
+  V(System, ClockGetMonotonic)
 
 // clang-format: on
 

shell/platform/fuchsia/dart-pkg/zircon/sdk_ext/system.h

@@ -63,8 +63,6 @@ class System : public fml::RefCountedThreadSafe<System>,
 
   static uint64_t ClockGetMonotonic();
 
-  static uint64_t ClockGet(uint32_t clock_id);
-
   static void RegisterNatives(tonic::DartLibraryNatives* natives);
 
   static zx_status_t ConnectToService(std::string path,