docs(java): Document removed OpenTelemetry APIs

List the OpenTelemetry integration and instrumenter APIs removed in v9 and direct readers to the supported Java OpenTelemetry documentation.

Refs getsentry/sentry-java#6243

Refs getsentry/sentry-java#6252

Co-Authored-By: Claude <noreply@anthropic.com>

Author: adinauer

docs/platforms/java/common/migration/8.x-to-9.0.mdx

@@ -4,7 +4,7 @@ description: "Learn how to migrate from version 8.x to 9.0 of the Sentry Java SD
 sidebar_order: 994
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-Version 9 removes the deprecated Hub compatibility APIs and the global Logs and Metrics enable options. Migrate remaining Hub references to Scopes, then update your telemetry configuration.
+Version 9 removes deprecated Hub compatibility and OpenTelemetry APIs, along with the global Logs and Metrics enable options. Migrate remaining Hub and OpenTelemetry references, then update your telemetry configuration.
 
 ## Removed Hub APIs
 
@@ -49,6 +49,19 @@ The Scopes model introduced in version 8 is the supported context model in versi
 
 For backend and other JVM applications, APIs such as `Sentry.configureScope()` and `Sentry.setTag()` use the isolation scope by default.
 
+## Removed OpenTelemetry APIs
+
+Version 9 removes these deprecated OpenTelemetry integration classes:
+
+- `SentrySpanProcessor`
+- `SentryPropagator`
+- `OpenTelemetryLinkErrorEventProcessor`
+- `Instrumenter`, including its `SentryOptions` option, `SpanContext` property, and `startChild` overloads
+- `SentrySpanStorage` (internal)
+- `TraceData` (internal)
+
+See the <PlatformLink to="/opentelemetry/">OpenTelemetry documentation</PlatformLink> for supported setup options.
+
 ## Manual Logs and Metrics
 
 Calls to `Sentry.logger()` and `Sentry.metrics()` no longer require a global enable option. Remove calls to: