(javax-money) Remove duplicated imports in MonetaryAmountDeserializer

[pjfanning]

Tidy-up only, no functional change.

MonetaryAmountDeserializer imports the same two types twice, in adjacent blocks:

import javax.money.CurrencyUnit;
import javax.money.MonetaryAmount;

import javax.money.CurrencyUnit;
import javax.money.MonetaryAmount;

Legal Java, but noise. Drops the second pair.

javax-money and moneta suites both green.

[pjfanning]

Closing as redundant: this cleanup is already included in #91, alongside the NPE fix in the same file.