Refactor external access integration and clean up SQL macros

- Removed the unused external access SQL file to streamline the project structure.
- Updated the S3 express external access integration macro by eliminating unnecessary schema usage.
- Adjusted dependencies in the utils SQL file to reflect the removal of the external access integration.

macros/livequery/external_access_integrations.sql

@@ -1,8 +1,4 @@
 {% macro create_s3_express_external_access_integration() %}
-  {% set use_schema_sql %}
-    USE SCHEMA live
-  {% endset %}
-
   {% set network_rule_sql %}
     CREATE NETWORK RULE IF NOT EXISTS s3_express_network_rule
     MODE = EGRESS

models/deploy/core/_external_access.sql

@@ -1,8 +0,0 @@
-{% if is_udf_api_v2_compatible() %}
-{{ create_s3_express_external_access_integration() }}
-{% endif %}
-
--- this is to pass the model render as dbt dependency in other models
--- livequery will need s3 express access to read from the s3 bucket
-
-SELECT 1

models/deploy/core/utils.sql

@@ -1,4 +1,3 @@
  -- depends_on: {{ ref('_utils') }}
- -- depends_on: {{ ref('_external_access')}}
 {% set config = config_core_utils %}
 {{ ephemeral_deploy_core(config) }}