refactor: remove lab errors command and its implementation

The lab errors command is no longer needed as build error reporting
has been moved to a centralized diagnostic dashboard.

Author: mattevans

pkg/commands/lab.go

@@ -55,7 +55,6 @@ Use 'xcli lab [command] --help' for more information about a command.`,
 	cmd.AddCommand(NewLabConfigCommand(log, configPath))
 	cmd.AddCommand(NewLabTUICommand(log, configPath))
 	cmd.AddCommand(NewLabDiagnoseCommand(log, configPath))
-	cmd.AddCommand(NewLabErrorsCommand(log, configPath))
 
 	return cmd
 }