Fix checkstyle

Author: KostasTsiounis

src/main/java/com/ibm/crypto/plus/provider/base/RSAKey.java

@@ -9,7 +9,6 @@
 package com.ibm.crypto.plus.provider.base;
 
 import com.ibm.crypto.plus.provider.OpenJCEPlusProvider;
-import com.ibm.crypto.plus.provider.PrimitiveWrapper;
 import com.ibm.crypto.plus.provider.ock.NativeOCKAdapterFIPS;
 import com.ibm.crypto.plus.provider.ock.NativeOCKAdapterNonFIPS;
 import java.math.BigInteger;