Revert "Pin httpx till upstream gets resolved (#3465)"

[sl0thentr0py]

0.27.2 was just released with a fix
encode/httpx#3288

[codecov]

❌ 4 Tests Failed:

Tests completed	Failed	Passed	Skipped
11474	4	11470	1635

View the top 3 failed tests by shortest run time

tests.integrations.aws_lambda.test_aws test_init_error[python3.9]

Stack Traces | 16.8s run time

.../integrations/aws_lambda/test_aws.py:334: in test_init_error
    (event,) = envelope_items
E   ValueError: not enough values to unpack (expected 1, got 0)

tests.integrations.aws_lambda.test_aws test_init_error[python3.11]

Stack Traces | 16.9s run time

.../integrations/aws_lambda/test_aws.py:334: in test_init_error
    (event,) = envelope_items
E   ValueError: not enough values to unpack (expected 1, got 0)

tests.integrations.aws_lambda.test_aws test_init_error[python3.10]

Stack Traces | 17.4s run time

.../integrations/aws_lambda/test_aws.py:334: in test_init_error
    (event,) = envelope_items
E   ValueError: not enough values to unpack (expected 1, got 0)

To view individual test run time comparison to the main branch, go to the Test Analytics Dashboard