chore: remove fragile unit tests

Author: karenc-bq

aws_advanced_python_wrapper/resources/aws_advanced_python_wrapper_messages.properties

@@ -26,7 +26,7 @@ AdfsCredentialsProviderFactory.SignOnPagePostActionUrl=[AdfsCredentialsProviderF
 AdfsCredentialsProviderFactory.SignOnPagePostActionRequestFailed=[AdfsCredentialsProviderFactory] ADFS SignOn Page POST action failed with HTTP status '{}', reason phrase '{}', and response '{}'
 AdfsCredentialsProviderFactory.SignOnPageUrl=[AdfsCredentialsProviderFactory] ADFS SignOn URL: '{}'
 
-AwsSdk.UnsupportedRegion=[AwsSdk] Unsupported AWS region {}. For supported regions please read https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html
+AwsSdk.UnsupportedRegion=[AwsSdk] Unsupported AWS region {}. Please check AWS documentation for supported AWS regions.
 
 AwsSecretsManagerPlugin.ConnectException=[AwsSecretsManagerPlugin] Error occurred while opening a connection: {}
 AwsSecretsManagerPlugin.EndpointOverrideInvalidConnection=[AwsSecretsManagerPlugin] A connection to the provided secrets_manager_endpoint could not be established: "{}".

tests/unit/test_iam_plugin.py

@@ -383,12 +383,6 @@ def test_connect_with_specified_host(iam_host: str, mocker, mock_plugin_service,
     assert actual_token.is_expired() is False
 
 
-def test_aws_supported_regions_url_exists():
-    url = "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.RegionsAndAvailabilityZones.html"
-    request = urllib.request.Request(url, headers={"User-Agent": "Mozilla/5.0"})
-    assert 200 == urllib.request.urlopen(request).getcode()
-
-
 @pytest.mark.parametrize("host", [
     pytest.param("<>"),
     pytest.param("#"),