Merge pull request #221467 from andreasjl/andreasl/Usnc

Remove Custom Speech training from USNC

Author: prmerger-automator[bot]

articles/cognitive-services/Speech-Service/regions.md

@@ -54,7 +54,7 @@ The following regions are supported for Speech service features such as speech-t
 | US | Central US | `centralus` |
 | US | East US | `eastus` <sup>1,2,3,4,5</sup>|
 | US | East US 2 | `eastus2` <sup>1,2,4,5</sup>|
-| US | North Central US | `northcentralus` <sup>1,4,6</sup>|
+| US | North Central US | `northcentralus` <sup>4,6</sup>|
 | US | South Central US | `southcentralus` <sup>1,2,3,4,5,6</sup>|
 | US | West Central US | `westcentralus` <sup>5</sup>|
 | US | West US | `westus` <sup>2,5</sup>|