[Backport M104] fix: remove OTEL metrics (#8070)

This is not quite used feature, removing for now.

## Test plan

- N/A
 <br> Backport d9c6213 from #8069

Co-authored-by: fengzhou-sg <feng.zhou@sourcegraph.com>

Author: sourcegraph-release-bot

vscode/src/services/open-telemetry/OpenTelemetryService.node.ts

@@ -16,9 +16,7 @@ import {
     startWith,
 } from '@sourcegraph/cody-shared'
 
-import { DiagConsoleLogger, DiagLogLevel, diag, metrics } from '@opentelemetry/api'
-import { OTLPMetricExporter } from '@opentelemetry/exporter-metrics-otlp-http'
-import { MeterProvider, PeriodicExportingMetricReader } from '@opentelemetry/sdk-metrics'
+import { DiagConsoleLogger, DiagLogLevel, diag } from '@opentelemetry/api'
 import { BatchSpanProcessor } from '@opentelemetry/sdk-trace-base'
 import { externalAuthRefresh } from '@sourcegraph/cody-shared/src/configuration/auth-resolver'
 import { isEqual } from 'lodash'
@@ -35,7 +33,6 @@ export interface OpenTelemetryServiceConfig {
     extensionVersion?: string
 }
 export class OpenTelemetryService {
-    private meterProvider?: MeterProvider
     private tracerProvider?: NodeTracerProvider
     private spanProcessors: BatchSpanProcessor[] = []
     private unloadInstrumentations?: () => void
@@ -65,11 +62,6 @@ export class OpenTelemetryService {
         // Register once at startup
         this.tracerProvider.register()
 
-        this.meterProvider = new MeterProvider({
-            resource,
-        })
-        metrics.setGlobalMeterProvider(this.meterProvider)
-
         this.configSubscription = combineLatest(
             resolvedConfig,
             featureFlagProvider.evaluatedFeatureFlag(FeatureFlag.CodyAutocompleteTracing),
@@ -85,18 +77,6 @@ export class OpenTelemetryService {
                     const headers = new Headers()
                     await addAuthHeaders(auth, headers, traceUrl)
 
-                    const metricUrl = new URL('/-/debug/otlp/v1/metrics', auth.serverEndpoint)
-                    this.meterProvider?.addMetricReader(
-                        new PeriodicExportingMetricReader({
-                            exporter: new OTLPMetricExporter({
-                                url: metricUrl.toString(),
-                                headers: Object.fromEntries(headers.entries()),
-                            }),
-                            // export metrics every minute
-                            exportIntervalMillis: 60 * 1000,
-                        })
-                    )
-
                     const newConfig = {
                         isTracingEnabled: this.isTracingEnabled,
                         traceUrl: traceUrl.toString(),
@@ -135,9 +115,6 @@ export class OpenTelemetryService {
 
     public dispose(): void {
         this.configSubscription.unsubscribe()
-        this.meterProvider
-            ?.shutdown()
-            .catch(error => console.error('Error shutting down meter provider:', error))
         this.reset().catch(error => console.error('Error disposing OpenTelemetry:', error))
     }