Revert "Add current rss and embedder name to Observatory"

runtime/vm/os_fuchsia.cc

Index: runtime/vm/os_fuchsia.cc
diff --git a/runtime/vm/os_fuchsia.cc b/runtime/vm/os_fuchsia.cc
index 11e795192f7d6e9803ade7e0e7967f9ca52227b6..3781f029ba27e3b84a1af3cf654ee12c4d41e387 100644
--- a/runtime/vm/os_fuchsia.cc
+++ b/runtime/vm/os_fuchsia.cc
@@ -136,6 +136,16 @@ int OS::NumberOfAvailableProcessors() {
   return sysconf(_SC_NPROCESSORS_CONF);
 }
 
+uintptr_t OS::MaxRSS() {
+  mx_info_task_stats_t task_stats;
+  mx_handle_t process = mx_process_self();
+  mx_status_t status = mx_object_get_info(
+      process, MX_INFO_TASK_STATS, &task_stats, sizeof(task_stats), NULL, NULL);
+  return (status == MX_OK)
+             ? (task_stats.mem_private_bytes + task_stats.mem_shared_bytes)
+             : 0;
+}
+
 void OS::Sleep(int64_t millis) {
   SleepMicros(millis * kMicrosecondsPerMillisecond);
 }