chore: remove telemetry API usage

remove telemetry as a providable API from the codebase. This includes removing it from generated distributions but also the provider registry, the router, etc

relates to #3806

Signed-off-by: Charlie Doern <cdoern@redhat.com>

llama_stack/distributions/postgres-demo/run.yaml

@@ -4,7 +4,6 @@ apis:
 - agents
 - inference
 - safety
-- telemetry
 - tool_runtime
 - vector_io
 providers:
@@ -49,13 +48,6 @@ providers:
         db: ${env.POSTGRES_DB:=llamastack}
         user: ${env.POSTGRES_USER:=llamastack}
         password: ${env.POSTGRES_PASSWORD:=llamastack}
-  telemetry:
-  - provider_id: meta-reference
-    provider_type: inline::meta-reference
-    config:
-      service_name: "${env.OTEL_SERVICE_NAME:=\u200B}"
-      sinks: ${env.TELEMETRY_SINKS:=console,otel_trace}
-      otel_exporter_otlp_endpoint: ${env.OTEL_EXPORTER_OTLP_ENDPOINT:=http://localhost:4318/v1/traces}
   tool_runtime:
   - provider_id: brave-search
     provider_type: remote::brave-search