Update README.md to remove duplicate doc line (#2141)

Author: jackshirazi

inferred-spans/README.md

@@ -41,7 +41,6 @@ So if you are using an autoconfigured OpenTelemetry SDK, you'll only need to add
 | otel.inferred.spans.interval <br/> OTEL_INFERRED_SPANS_INTERVAL                               | `5s`                                                                                                                                                                                                                                                              | The interval at which profiling sessions should be started.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       |
 | otel.inferred.spans.duration <br/> OTEL_INFERRED_SPANS_DURATION                               | `5s`                                                                                                                                                                                                                                                              | The duration of a profiling session. For sampled transactions which fall within a profiling session (they start after and end before the session), so-called inferred spans will be created. They appear in the trace waterfall view like regular spans. <br/> NOTE: It is not recommended to set much higher durations as it may fill the activation events file and async-profiler's frame buffer. Warnings will be logged if the activation events file is full. If you want to have more profiling coverage, try decreasing `profiling_inferred_spans_interval`                                                               |
 | otel.inferred.spans.lib.directory <br/> OTEL_INFERRED_SPANS_LIB_DIRECTORY                     | Defaults to the value of `java.io.tmpdir`                                                                                                                                                                                                                         | Profiling requires that the [async-profiler](https://github.com/async-profiler/async-profiler) shared library  is exported to a temporary location and loaded by the JVM. The partition backing this location must be executable, however in some server-hardened environments,  `noexec` may be set on the standard `/tmp` partition, leading to `java.lang.UnsatisfiedLinkError` errors. Set this property to an alternative directory (e.g. `/var/tmp`) to resolve this.                                                                                                                                                       |
-| otel.inferred.spans.duration <br/> OTEL_INFERRED_SPANS_DURATION                               | `5s`                                                                                                                                                                                                                                                              | The duration of a profiling session. For sampled transactions which fall within a profiling session (they start after and end before the session), so-called inferred spans will be created. They appear in the trace waterfall view like regular spans. <br/> NOTE: It is not recommended to set much higher durations as it may fill the activation events file and async-profiler's frame buffer. Warnings will be logged if the activation events file is full. If you want to have more profiling coverage, try decreasing `profiling_inferred_spans_interval`                                                               |
 | otel.inferred.spans.parent.override.handler <br/> OTEL_INFERRED_SPANS_PARENT_OVERRIDE_HANDLER | Defaults to a handler adding span-links to the inferred span                                                                                                                                                                                                      | Inferred spans sometimes need to be inserted as the new parent of a normal span, which is not directly possible because that span has already been sent. For this reason, this relationship needs to be represented differently, which normally is done by adding a span-link to the inferred span. This configuration can be used to override that behaviour by providing the fully qualified name of a class implementing `BiConsumer<SpanBuilder, SpanContext>`: The biconsumer will be invoked with the inferred span as first argument and the span for which the inferred one was detected as new parent as second argument |
 
 ### Manual SDK setup