removed unused imports from extra module

Author: ashutoshcp

src/main/java/com/jsoniter/extra/Base64Support.java

@@ -2,7 +2,6 @@
 
 import com.jsoniter.JsonIterator;
 import com.jsoniter.spi.Slice;
-import com.jsoniter.any.Any;
 import com.jsoniter.output.JsonStream;
 import com.jsoniter.spi.Decoder;
 import com.jsoniter.spi.Encoder;