Remove unneeded imports

src/main/lombok/org/leumasjaffe/charsheet/model/magic/impl/Researched.java

@@ -8,7 +8,6 @@ import java.util.Map;
 
 import org.leumasjaffe.charsheet.model.DDClass;
 import org.leumasjaffe.charsheet.model.magic.DDSpell;
-import org.leumasjaffe.charsheet.model.observable.IntValue;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
 import com.fasterxml.jackson.annotation.JsonValue;