remove language-specific reference and clarify OTLP metrics endpoint behavior

Author: Wineshuga

content/en/docs/languages/_includes/exporters/prometheus-setup.md

@@ -31,8 +31,7 @@ export OTEL_EXPORTER_OTLP_METRICS_ENDPOINT=http://localhost:9090/api/v1/otlp
 ```
 Note:
 
-- The [OpenTelemetry specification](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.50.0/specification/protocol/exporter.md#endpoint-urls-for-otlphttp) states that the OTEL_EXPORTER_OTLP_METRICS_ENDPOINT env var must be used as a base URL. The signal `/v1/metrics` is automatically appended
-- See also: [opentelemetry-python #2443](https://github.com/open-telemetry/opentelemetry-python/issues/2443) 
+The OTEL_EXPORTER_OTLP_METRICS_ENDPOINT environment variable is treated as a base URL. The `/v1/metrics` path is appended as defined by the [OpenTelemetry specification](https://github.com/open-telemetry/opentelemetry-specification/blob/v1.50.0/specification/protocol/exporter.md#endpoint-urls-for-otlphttp).
 
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