Remove resource_definition (#9736)

mmv1/provider/terraform/custom_code.rb

@@ -34,12 +34,7 @@ class CustomCode < Api::Object
       # resource's Resource.Schema map.  They should be formatted as
       # entries in the map, e.g. `"foo": &schema.Schema{ ... },`.
       attr_reader :extra_schema_entry
-      # Resource definition code is inserted below everything else
-      # in the resource's Resource {...} definition.  This may be useful
-      # for things like a MigrateState / SchemaVersion pair.
-      # This is likely to be used rarely and may be removed if all its
-      # use cases are covered in other ways.
-      attr_reader :resource_definition
+
       # ====================
       # Encoders & Decoders
       # ====================
@@ -132,7 +127,6 @@ def validate
         super
 
         check :extra_schema_entry, type: String
-        check :resource_definition, type: String
         check :encoder, type: String
         check :update_encoder, type: String
         check :decoder, type: String

mmv1/templates/terraform/resource.erb

@@ -144,8 +144,6 @@ func Resource<%= resource_name -%>() *schema.Resource {
         DeprecationMessage: "<%= object.deprecation_message -%>",
 <% end -%>
 
-<%= lines(compile(pwd + '/' + object.custom_code.resource_definition)) if object.custom_code.resource_definition -%>
-
         Schema: map[string]*schema.Schema{
 <%  order_properties(properties).each do |prop| -%>
 <%=       lines(build_schema_property(prop, object, pwd)) -%>