[Java]: remove unused imports

Author: tmontgomery

sbe-samples/src/main/java/uk/co/real_logic/sbe/examples/ExampleUsingGeneratedStubExtension.java

@@ -24,7 +24,6 @@
 import java.nio.channels.FileChannel;
 
 import static extension.CarEncoder.cupHolderCountNullValue;
-import static extension.CarEncoder.makeMetaAttribute;
 
 public class ExampleUsingGeneratedStubExtension
 {

sbe-tool/src/main/java/uk/co/real_logic/sbe/otf/Util.java

@@ -17,7 +17,6 @@
 
 import uk.co.real_logic.agrona.DirectBuffer;
 import uk.co.real_logic.sbe.PrimitiveType;
-import uk.co.real_logic.sbe.codec.java.CodecUtil;
 import uk.co.real_logic.sbe.ir.Encoding;
 
 import java.nio.ByteOrder;