modify docs

Author: allen-k1m

instrumentation/opentelemetry-instrumentation-asyncio/src/opentelemetry/instrumentation/asyncio/__init__.py

@@ -17,22 +17,6 @@
 The opentelemetry-instrumentation-asycnio package allows tracing asyncio applications.
 The metric for coroutine, future, is generated even if there is no setting to generate a span.
 
-
-Set the name of the coroutine you want to trace.
--------------------------------------------------
-.. code::
-    export OTEL_PYTHON_ASYNCIO_COROUTINE_NAMES_TO_TRACE=coro_name,coro_name2,coro_name3
-
-If you want to keep track of which function to use in the to_thread function of asyncio, set the name of the function.
-------------------------------------------------------------------------------------------------------------------------
-.. code::
-    export OTEL_PYTHON_ASYNCIO_TO_THREAD_FUNCTION_NAMES_TO_TRACE=func_name,func_name2,func_name3
-
-For future, set it up like this
----------------------------------
-.. code::
-    export OTEL_PYTHON_ASYNCIO_FUTURE_TRACE_ENABLED=true
-
 Run instrumented application
 ------------------------------
 1. coroutine