remove default `propagators` config?

[sjvans]

telemetry/package.json

Lines 76 to 78 in c567f66

	"propagators": [
	"W3CTraceContextPropagator"
	],

[tsteckenborn]

Without having taken a deeper look at the implementation, e.g. the opentelemetry-sdk-node seems to use a composite one including baggage by default, see here.

[sjvans]

can't remove it because the "default" is in sdk-node, which we don't use → adjust default