How to delete my "Other Transactions"

Your “Other Transactions” (previously “Uncategorized Wallet”) is a permanent placeholder for unclassified transactions. This means that any transactions that are not associated with an Exchange, Wallet, or Import are grouped in your Other Transactions.

Therefore, your Other Transactions cannot be deleted. Manually added transactions within your Other Transactions can be manually deleted in the Transactions tab, via the View Transactions button in the wallet dropdown.