DOCSP-47896: Remove slow operation threshold information (#849)

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- [DOCSP-47896](https://jira.mongodb.org/browse/DOCSP-47896)
-
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(cherry picked from commit a27dc5c)

Author: norareidy

source/tutorial/profile-database.txt

@@ -158,27 +158,6 @@ Above the chart, select the metric and time period you want to see.
    - 1 hr
    - 15 min
 
-.. _profiler-chart-change-slow-ops-threshold:
-
-Change Slow Operations Threshold
-````````````````````````````````
-
-To change the slow operations threshold:
-
-1. Click the :guilabel:`Milliseconds` button to the right of the
-   :guilabel:`For Operations Longer Than` label to open the
-   :guilabel:`Specify the Threshold for Slow Operations` modal.
-
-#. Change the :guilabel:`Set the Threshold for Slow Operations` to your
-   desired number of milliseconds.
-
-#. Click :guilabel:`Apply` if you want to change the threshold. Click
-   :guilabel:`Cancel` to close the modal without changing the
-   threshold.
-
-When you change the threshold, you change it for all databases on the
-instance.
-
 .. _profiler-chart-suggest-indexes:
 
 Request Index Suggestions