[CODEOWNERS] Remove invalid owner (#52983)

The focus of these changes is to remove an owner flagged by the linter as no longer valid.

Author: jsquire

.github/CODEOWNERS

@@ -323,7 +323,7 @@
 /sdk/communication/Azure.Communication.Rooms/                      @minnieliu @paolamvhz @alexokun @Mrayyan @shwali-msft @allchiang-msft @mikehang-msft
 
 # PRLabel: %Communication - Short Codes
-/sdk/communication/Azure.Communication.ShortCodes/                 @Arazan @whisper6284 @danielortega-msft @sofiar-msft
+/sdk/communication/Azure.Communication.ShortCodes/                 @Arazan @whisper6284 @danielortega-msft
 
 # PRLabel: %Communication - SMS
 /sdk/communication/Azure.Communication.Sms/                        @gfeitosa-msft @phermanov-msft @ilyapaliakou-msft @besh2014