awaitable examples are simplified

[ashtum]

No need for rebind_executor as asio::deferred is now the default completion token.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.09%. Comparing base (a3a800b) to head (4072be7).

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #2897   +/-   ##
========================================
  Coverage    93.09%   93.09%           
========================================
  Files          177      177           
  Lines        13709    13709           
========================================
  Hits         12763    12763           
  Misses         946      946           

Files	Coverage Δ
...ude/boost/beast/_experimental/test/impl/stream.hpp	99.31% <100.00%> (ø)
include/boost/beast/core/async_base.hpp	100.00% <100.00%> (ø)
include/boost/beast/core/impl/basic_stream.hpp	83.06% <100.00%> (ø)
...ude/boost/beast/core/impl/buffered_read_stream.hpp	91.52% <100.00%> (ø)
include/boost/beast/http/impl/read.hpp	98.46% <100.00%> (ø)
include/boost/beast/http/impl/write.hpp	92.07% <100.00%> (ø)
include/boost/beast/websocket/detail/impl_base.hpp	86.01% <ø> (ø)
include/boost/beast/websocket/impl/teardown.hpp	78.26% <100.00%> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a3a800b...4072be7. Read the comment docs.