remove unused constructor

Signed-off-by: Florian Thienel <florian@thienel.org>
diff --git a/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/layout/DocumentTextBox.java b/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/layout/DocumentTextBox.java
index 5d69168..1ac5c73 100644
--- a/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/layout/DocumentTextBox.java
+++ b/org.eclipse.vex.core/src/org/eclipse/vex/core/internal/layout/DocumentTextBox.java
@@ -16,7 +16,6 @@
 import org.eclipse.vex.core.internal.css.Styles;
 import org.eclipse.vex.core.internal.dom.Node;
 import org.eclipse.vex.core.internal.dom.Range;
-import org.eclipse.vex.core.internal.dom.Text;
 
 /**
  * A TextBox that gets its text from the document. Represents text which is editable within the VexWidget.
@@ -27,19 +26,6 @@
 	private final int endRelative;
 
 	/**
-	 * Class constructor, accepting a Text object.
-	 * 
-	 * @param context
-	 *            LayoutContext in use
-	 * @param node
-	 *            Node being used
-	 * @param text
-	 */
-	public DocumentTextBox(final LayoutContext context, final Node node, final Text text) {
-		this(context, node, text.getStartOffset(), text.getEndOffset());
-	}
-
-	/**
 	 * Class constructor.
 	 * 
 	 * @param context