If you are going to relinquish your rights in property you will have to pay capital gain on such transaction as relinquishment of right comes under the definition of transfer.
The bank must be doing this because they want to keep the loan file strong and not reduce the loan paying capacity and so it won't affect you much as you would have transferred the ownership so just make your brother the first person in loan and it should be fine even if the bank is not removing your name.
I would suggest you to transfer it as gift to your brother which would save it from capital gain tax.
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