Issue #3454189: hook_update_8003 to 8.x-1.8 installs optional config and breaks my site

config/optional/block.block.workflowtransitionform.yml

@@ -6,7 +6,6 @@ dependencies:
 _core:
   default_config_hash: EkPFj8uba5YsGtMNWXPTQ40UIzmW-MwIOhkdBgx2reI
 id: workflowtransitionform
-region: ''
 weight: -7
 provider: workflow
 plugin: workflow_transition_form_block

workflow.install

@@ -109,8 +109,7 @@ function workflow_update_8002(&$sandbox) {
 }
 
 /**
- * This will install a Transition Block, a History View and an Action.
+ * This will optionally install a Transition Block, History View and Action.
  */
 function workflow_update_8003(&$sandbox) {
-  \Drupal::service('config.installer')->installOptionalConfig();
 }