Why were these books 'removed' from the Bible?
It depends on the book. The Apocrypha was printed in the original 1611 King James Bible but most Protestant printers stopped including it in the early 1800s, partly to keep costs down. The Book of Enoch and Book of Jasher were never in the Protestant Bible to begin with — they were widely read in biblical times but were not included by the early church councils that fixed the canon.