fix: Remove vendored boost file to compile with boost 1.87.

fix: Replace expires_from_now with expires_after.

Author: kinyoklion

contract-tests/sse-contract-tests/src/event_outbox.cpp

@@ -37,13 +37,13 @@ void EventOutbox::do_shutdown(beast::error_code ec) {
 void EventOutbox::post_event(launchdarkly::sse::Event event) {
     auto http_request = build_request(callback_counter_++, std::move(event));
     outbox_.push(http_request);
-    flush_timer_.expires_from_now(boost::posix_time::milliseconds(0));
+    flush_timer_.expires_after(boost::posix_time::milliseconds(0));
 }
 
 void EventOutbox::post_error(launchdarkly::sse::Error error) {
     auto http_request = build_request(callback_counter_++, error);
     outbox_.push(http_request);
-    flush_timer_.expires_from_now(boost::posix_time::milliseconds(0));
+    flush_timer_.expires_after(boost::posix_time::milliseconds(0));
 }
 
 void EventOutbox::run() {
@@ -133,7 +133,7 @@ void EventOutbox::on_flush_timer(boost::system::error_code ec) {
     }
 
     // If the outbox is empty, wait a bit before trying again.
-    flush_timer_.expires_from_now(kFlushInterval);
+    flush_timer_.expires_after(kFlushInterval);
     flush_timer_.async_wait(beast::bind_front_handler(
         &EventOutbox::on_flush_timer, shared_from_this()));
 }

libs/internal/src/events/asio_event_processor.cpp

@@ -168,7 +168,7 @@ void AsioEventProcessor<SDK>::ScheduleFlush() {
     LD_LOG(logger_, LogLevel::kDebug) << "event-processor: scheduling flush in "
                                       << flush_interval_.count() << "ms";
 
-    timer_.expires_from_now(flush_interval_);
+    timer_.expires_after(flush_interval_);
     timer_.async_wait([this](boost::system::error_code ec) {
         if (ec) {
             LD_LOG(logger_, LogLevel::kDebug)

libs/internal/src/events/request_worker.cpp

@@ -109,7 +109,7 @@ void RequestWorker::OnDeliveryAttempt(network::HttpResult const& result,
                     << tag_ << "error posting " << batch_->Count()
                     << " event(s) (will retry): HTTP error " << result.Status();
             }
-            timer_.expires_from_now(retry_delay_);
+            timer_.expires_after(retry_delay_);
             timer_.async_wait([this, callback](boost::system::error_code ec) {
                 if (ec) {
                     return;

libs/server-sent-events/src/client.cpp

@@ -140,7 +140,7 @@ class FoxyClient : public Client,
 
         create_session();
         create_parser();
-        backoff_timer_.expires_from_now(backoff_.delay());
+        backoff_timer_.expires_after(backoff_.delay());
         backoff_timer_.async_wait(beast::bind_front_handler(
             &FoxyClient::on_backoff, shared_from_this()));
     }