Removing block from workspace does not remove the block from page fieldtype.

*Steps to reproduce:*
1. Create a new content item with page fieldtype,
2. Add some blocks and fill the settings,
3. Publish it,
4. Edit previously created content,
5. Remove any block,
6. Publish it.

*Expected result*
The published version should not contain a removed block.

*Actual result*
The published version still contains a removed block.