General Terms:
* Editing: This is a broad term that encompasses all types of changes made to a text, including removing parts.
* Censorship: This refers to the removal of material deemed offensive or inappropriate.
* Redacting: This is the process of removing sensitive or confidential information from a document.
* Abridging: This specifically refers to shortening a book by removing parts, often to create a shorter version for children or for easier reading.
Other Specific Terms:
* Excision: This refers to the surgical removal of something, and can be used to describe the removal of a section of text.
* Deletion: This is a more technical term for removing something, often used in computer contexts.
* Omission: This refers to something that is left out, and can be used to describe the removal of a part of a book.
The best term to use depends on the specific situation and the reason for the removal.