Remove `matrix_synapse_container_image_customizations_s3_storage_provider_installation_old_boto_workaround_enabled`

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/4637

We no longer need to boto workaround since s3-storage-provider got
upgraded to v1.6.0 in https://github.com/spantaleev/matrix-docker-ansible-deploy/pull/4635

roles/custom/matrix-synapse/defaults/main.yml

@@ -48,10 +48,6 @@ matrix_synapse_container_image_customizations_enabled: |-
 # The version that will be installed is specified in `matrix_synapse_ext_synapse_s3_storage_provider_version`.
 matrix_synapse_container_image_customizations_s3_storage_provider_installation_enabled: "{{ matrix_synapse_ext_synapse_s3_storage_provider_enabled }}"
 
-# Controls whether to install an old version of boto3 and botocore, to work around the following issue:
-# https://github.com/aws/aws-cli/issues/9214
-matrix_synapse_container_image_customizations_s3_storage_provider_installation_old_boto_workaround_enabled: true
-
 # Controls whether custom build steps will be added to the Dockerfile for installing auto-accept-invite module.
 # The version that will be installed is specified in `matrix_synapse_ext_synapse_auto_accept_invite_version`.
 matrix_synapse_container_image_customizations_auto_accept_invite_installation_enabled: "{{ matrix_synapse_ext_synapse_auto_accept_invite_enabled }}"

roles/custom/matrix-synapse/tasks/validate_config.yml

@@ -117,6 +117,8 @@
     - {'old': 'matrix_synapse_experimental_features_msc3861_admin_token', 'new': '<removed>'}
     - {'old': 'matrix_synapse_experimental_features_msc3861_account_management_url', 'new': '<removed>'}
 
+    - {'old': 'matrix_synapse_container_image_customizations_s3_storage_provider_installation_old_boto_workaround_enabled', 'new': '<removed; see https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/4637>'}
+
 - name: (Deprecation) Catch and report renamed settings in matrix_synapse_configuration_extension_yaml
   ansible.builtin.fail:
     msg: >-

roles/custom/matrix-synapse/templates/synapse/customizations/Dockerfile.j2

@@ -45,12 +45,8 @@ RUN pip install synapse-auto-accept-invite=={{ matrix_synapse_ext_synapse_auto_a
 {% endif %}
 
 {% if matrix_synapse_container_image_customizations_s3_storage_provider_installation_enabled %}
-{% if matrix_synapse_container_image_customizations_s3_storage_provider_installation_old_boto_workaround_enabled %}
-RUN pip install 'boto3<1.36.0' 'botocore<1.36.0' synapse-s3-storage-provider=={{ matrix_synapse_ext_synapse_s3_storage_provider_version }}
-{% else %}
 RUN pip install synapse-s3-storage-provider=={{ matrix_synapse_ext_synapse_s3_storage_provider_version }}
 {% endif %}
-{% endif %}
 
 {% if matrix_synapse_container_image_customizations_templates_enabled %}
 COPY --from=templates-builder {{ matrix_synapse_container_image_customizations_templates_in_container_base_path }} {{ matrix_synapse_container_image_customizations_templates_in_container_base_path }}