Move callback classRemove outside of the loop

Closes #3200706

core/modules/workspaces/config/install/core.entity_form_display.workspace.workspace.deploy.yml

-langcode: en
-status: true
-dependencies:
-  config:
-    - core.entity_form_mode.workspace.deploy
-  module:
-    - workspaces
-id: workspace.workspace.deploy
-targetEntityType: workspace
-bundle: workspace
-mode: deploy
-content: {  }
-hidden:
-  parent: true
-  uid: true