internal/telemetry: remove an extraneous comment

There was a fragment of a sentence that must have been from a previous version
(as it talks about a return value for a function that does not have one).

Change-Id: I9d154fe10711344f93e1d49b68a811dbc9772710
Reviewed-on: https://go-review.googlesource.com/c/tools/+/212241
Run-TryBot: Ian Cottrell <iancottrell@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emm.odeke@gmail.com>
diff --git a/internal/telemetry/export/export.go b/internal/telemetry/export/export.go
index 8ed8cd3..a48c6f1 100644
--- a/internal/telemetry/export/export.go
+++ b/internal/telemetry/export/export.go
@@ -22,7 +22,7 @@
 
 	// Log is a function that handles logging events.
 	// Observers may use information in the context to decide what to do with a
-	// given log event. They should return true if they choose to handle the
+	// given log event.
 	Log(context.Context, telemetry.Event)
 
 	Metric(context.Context, telemetry.MetricData)