Remove lane speed key construction failure log

[tshalvi]

Description

Removed the lane_speed key construction failure log from media_settings_parser.

Motivation and Context

The lane_speed_key is one of the key types used for the media_settings.json lookup. This type of key is not relevant for all vendors, and thus it is not mandatory. After some discussion, it was decided to completely remove this error log.

How Has This Been Tested?

Additional Information (Optional)

[prgeor]

@tshalvi can you do a force push to re-trigger the checks?

[prgeor]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[prgeor]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).