Tidy up imports.

Author: aardvark179

src/main/java/org/truffleruby/cext/UnwrapNode.java

@@ -14,8 +14,6 @@
 import static org.truffleruby.cext.ValueWrapperManager.OBJECT_TAG;
 import static org.truffleruby.cext.ValueWrapperManager.FALSE_HANDLE;
 
-import org.truffleruby.Layouts;
-
 import org.truffleruby.cext.UnwrapNodeGen.UnwrapNativeNodeGen;
 import org.truffleruby.language.NotProvided;
 import org.truffleruby.language.RubyBaseNode;

src/main/java/org/truffleruby/cext/ValueWrapperManager.java

@@ -11,12 +11,10 @@
 
 import java.lang.ref.WeakReference;
 
-import org.truffleruby.Layouts;
 import org.truffleruby.RubyContext;
 import org.truffleruby.collections.LongHashMap;
 import org.truffleruby.extra.ffi.Pointer;
 import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
-import com.oracle.truffle.api.object.DynamicObject;
 
 public class ValueWrapperManager {