Remove GMP factory functions and readme (#452)

Remove GMP factory functions and readme

exporter/collector/googlemanagedprometheus/go.mod

@@ -3,57 +3,26 @@ module github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/colle
 go 1.17
 
 require (
-	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/collector v0.32.3
 	github.com/stretchr/testify v1.7.1
-	go.opentelemetry.io/collector v0.53.0
 	go.opentelemetry.io/collector/pdata v0.53.0
 	go.opentelemetry.io/collector/semconv v0.53.0
 	google.golang.org/genproto v0.0.0-20220405205423-9d709892a2bf
 )
 
 require (
-	cloud.google.com/go v0.100.2 // indirect
-	cloud.google.com/go/compute v1.5.0 // indirect
-	cloud.google.com/go/logging v1.4.2 // indirect
-	cloud.google.com/go/monitoring v1.4.0 // indirect
-	cloud.google.com/go/trace v1.2.0 // indirect
-	github.com/GoogleCloudPlatform/opentelemetry-operations-go/exporter/trace v1.8.3 // indirect
-	github.com/GoogleCloudPlatform/opentelemetry-operations-go/internal/resourcemapping v0.32.3 // indirect
-	github.com/cenkalti/backoff/v4 v4.1.3 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/go-logr/logr v1.2.3 // indirect
-	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/gogo/protobuf v1.3.2 // indirect
-	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.2 // indirect
 	github.com/google/go-cmp v0.5.7 // indirect
-	github.com/googleapis/gax-go/v2 v2.2.0 // indirect
-	github.com/json-iterator/go v1.1.12 // indirect
-	github.com/knadh/koanf v1.4.1 // indirect
-	github.com/mitchellh/copystructure v1.2.0 // indirect
-	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/mitchellh/reflectwalk v1.0.2 // indirect
-	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
-	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/kr/pretty v0.3.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rogpeppe/go-internal v1.8.1 // indirect
-	go.opencensus.io v0.23.0 // indirect
-	go.opentelemetry.io/otel v1.7.0 // indirect
-	go.opentelemetry.io/otel/metric v0.30.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.7.0 // indirect
-	go.opentelemetry.io/otel/trace v1.7.0 // indirect
-	go.uber.org/atomic v1.9.0 // indirect
-	go.uber.org/multierr v1.8.0 // indirect
-	go.uber.org/zap v1.21.0 // indirect
 	golang.org/x/net v0.0.0-20220325170049-de3da57026de // indirect
-	golang.org/x/oauth2 v0.0.0-20220309155454-6242fa91716a // indirect
-	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
 	golang.org/x/sys v0.0.0-20220328115105-d36c6a25d886 // indirect
 	golang.org/x/text v0.3.7 // indirect
-	google.golang.org/api v0.74.0 // indirect
-	google.golang.org/appengine v1.6.7 // indirect
 	google.golang.org/grpc v1.47.0 // indirect
 	google.golang.org/protobuf v1.28.0 // indirect
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )