Cleanup some settings from settings_test.py (#6313)

During the investigation of
#6279, I found that:
- `OPTIMIZE_JOB_CUTOFF_TIME` is overridden to `24` and it was causing
test failures.
- `OPTIMIZE_PARALLEL_MAX_JITTER_MINUTES` does not seem to be used
anywhere in the code.

With the change, less no. of local tests fail. The failure number is
non-zero because #6279 was
reverted yesterday . I would like to verify if this small change passes
through the CI and stays stable in prod.

snuba/settings/settings_test.py

@@ -39,11 +39,6 @@
 # Set enforce retention to true for tests
 ENFORCE_RETENTION = True
 
-# Ignore optimize job cut off time for tests
-OPTIMIZE_JOB_CUTOFF_TIME = 24
-
-OPTIMIZE_PARALLEL_MAX_JITTER_MINUTES = 0
-
 ADMIN_ALLOWED_PROD_PROJECTS = [1, 11276]
 
 REDIS_CLUSTERS = {