[jaegerreceiver] Remove unused remote sampling server

[yurishkuro]

Description

The RemoteSampling config of the receiver has been disabled in the past (it just logs a warning now), but the code for the actual sampling server was still around. This PR removes that code.

While the endpoint is defined in the private config

opentelemetry-collector-contrib/receiver/jaegerreceiver/trace_receiver.go

Line 51 in b53b5ad

AgentHTTPEndpoint string

it has been removed from the public config and the private part is never populated

opentelemetry-collector-contrib/receiver/jaegerreceiver/factory.go

Lines 107 to 109 in b53b5ad

	if rCfg.RemoteSampling != nil {
	set.Logger.Warn("You are using a deprecated no-op `remote_sampling` option which will be removed soon; use a `jaegerremotesampling` extension instead")
	}

Testing

CI

[codeboten]

Change looks good, needs merge conflicts addressed