[API] Code Generator: Removes deprecated code

Author: picandocodigo

elasticsearch-api/utils/thor/generator/endpoint_specifics.rb

@@ -28,7 +28,6 @@ module EndpointSpecifics
         indices.exists
         indices.exists_alias
         indices.exists_template
-        indices.exists_type
       ].freeze
 
       # Endpoints that need Utils.__rescue_from_not_found if the ignore

elasticsearch-api/utils/thor/templates/_method_setup.erb

@@ -16,9 +16,6 @@
 # specific language governing permissions and limitations
 # under the License.
 %>
-<%- if @method_name == 'search' -%>
-  arguments[:index] = UNDERSCORE_ALL if ! arguments[:index] && arguments[:type]
-<%- end -%>
 <%- @parts.each do |name, _| %>
   <%- unless @method_name == 'get_field_mapping' && name == 'fields' %>
     <%= '  '*(@namespace_depth+3) + "_#{name}" %> = arguments.delete(:<%=name %>)