Revert "added SENTRY_ENV environment variable"

[matprov]

This reverts commit c461a17.

Overview

This PR corrects a critical issue in 0.7.6.
According to https://develop.sentry.dev/config/, we only need to define SENTRY_ENVIRONMENT.

The issue in question:

finch         |   File "/code/finch/__init__.py", line 7, in <module>
finch         |     from .wsgi import application  # noqa: F401
finch         |   File "/code/finch/wsgi.py", line 11, in <module>
finch         |     sentry_sdk.init(os.environ["SENTRY_DSN"], SENTRY_ENV)
finch         |   File "/opt/conda/envs/finch/lib/python3.9/site-packages/sentry_sdk/hub.py", line 105, in _init
finch         |     client = Client(*args, **kwargs)  # type: ignore
finch         |   File "/opt/conda/envs/finch/lib/python3.9/site-packages/sentry_sdk/client.py", line 85, in __init__
finch         |     self.options = get_options(*args, **kwargs)  # type: Dict[str, Any]
finch         |   File "/opt/conda/envs/finch/lib/python3.9/site-packages/sentry_sdk/client.py", line 52, in _get_options
finch         |     options = dict(*args, **kwargs)
finch         | ValueError: dictionary update sequence element #0 has length 1; 2 is required

Changes:

• Reverted commit that adds SENTRY_ENV to sentry SDK config