chore: remove opencensus library and remove DatastoreMetricsOptionLegacyPrometheus

Author: miparnisari

go.mod

@@ -20,7 +20,6 @@ replace github.com/influxdata/tdigest => github.com/hdrodz/tdigest v0.0.0-202304
 require (
 	buf.build/gen/go/prometheus/prometheus/protocolbuffers/go v1.36.6-20250320161912-af2aab87b1b3.1
 	cloud.google.com/go/spanner v1.82.0
-	contrib.go.opencensus.io/exporter/prometheus v0.4.2
 	github.com/IBM/pgxpoolprometheus v1.1.2
 	github.com/KimMachineGun/automemlimit v0.7.2
 	github.com/Masterminds/semver v1.5.0
@@ -96,7 +95,6 @@ require (
 	github.com/spf13/cobra v1.9.1
 	github.com/spf13/pflag v1.0.6
 	github.com/stretchr/testify v1.10.0
-	go.opencensus.io v0.24.0
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.60.0
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.61.0
 	go.opentelemetry.io/otel v1.36.0
@@ -119,8 +117,6 @@ require (
 	sigs.k8s.io/controller-runtime v0.21.0
 )
 
-require golang.org/x/vuln v1.1.4 // indirect
-
 // Most tools are managed in the magefiles module. These tools are just
 // the ones that can't run from a submodule at the moment.
 tool (
@@ -230,8 +226,6 @@ require (
 	github.com/ghostiam/protogetter v0.3.15 // indirect
 	github.com/go-critic/go-critic v0.13.0 // indirect
 	github.com/go-jose/go-jose/v4 v4.0.5 // indirect
-	github.com/go-kit/log v0.2.1 // indirect
-	github.com/go-logfmt/logfmt v0.5.1 // indirect
 	github.com/go-logr/logr v1.4.3 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
 	github.com/go-openapi/jsonpointer v0.21.0 // indirect
@@ -342,7 +336,6 @@ require (
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
 	github.com/polyfloyd/go-errorlint v1.8.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
-	github.com/prometheus/statsd_exporter v0.22.7 // indirect
 	github.com/quasilyte/go-ruleguard v0.4.4 // indirect
 	github.com/quasilyte/go-ruleguard/dsl v0.3.22 // indirect
 	github.com/quasilyte/gogrep v0.5.0 // indirect
@@ -401,6 +394,7 @@ require (
 	go-simpler.org/musttag v0.13.1 // indirect
 	go-simpler.org/sloglint v0.11.0 // indirect
 	go.augendre.info/fatcontext v0.8.0 // indirect
+	go.opencensus.io v0.24.0 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
 	go.opentelemetry.io/contrib/detectors/gcp v1.35.0 // indirect
 	go.opentelemetry.io/contrib/propagators/b3 v1.20.0 // indirect
@@ -424,6 +418,7 @@ require (
 	golang.org/x/term v0.32.0 // indirect
 	golang.org/x/text v0.26.0 // indirect
 	golang.org/x/tools v0.34.0 // indirect
+	golang.org/x/vuln v1.1.4 // indirect
 	google.golang.org/genproto v0.0.0-20250505200425-f936aa4a68b2 // indirect
 	gopkg.in/evanphx/json-patch.v4 v4.12.0 // indirect
 	gopkg.in/inf.v0 v0.9.1 // indirect