Remove explicite log procerros env var

[jeremydvoss]

Description

Copy of microsoft/ApplicationInsights-Python#311

We are now leveraging OT env vars for our configuration instead of custom ones. Confirmed that OT sdk uses OTEL_BLRP_SCHEDULE_DELAY as specified here in the usage docs.

Fixes microsoft/ApplicationInsights-Python#265

PR that added these env vars to OT sdk: open-telemetry/opentelemetry-python#3237

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• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
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[azure-sdk]

API change check

API changes are not detected in this pull request.