Remove unnecessary code from deprecated classes

xml/impl/src/com/intellij/xml/template/formatter/AbstractXmlTemplateFormattingModelBuilder.java

@@ -41,7 +41,6 @@ import org.jetbrains.annotations.Nullable;
 import java.util.ArrayList;
 import java.util.List;
 
-@SuppressWarnings("Duplicates")
 public abstract class AbstractXmlTemplateFormattingModelBuilder extends SimpleTemplateLanguageFormattingModelBuilder {
   @NotNull
   @Override

xml/impl/src/com/intellij/xml/template/formatter/TemplateFormatUtil.java

@@ -38,7 +38,6 @@ import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 
-@SuppressWarnings("Duplicates")
 public class TemplateFormatUtil {
 
   private final static List<PsiElement> EMPTY_PSI_ELEMENT_LIST = new ArrayList<>();

xml/impl/src/com/intellij/xml/template/formatter/TemplateLanguageBlock.java

@@ -32,7 +32,6 @@ import org.jetbrains.annotations.Nullable;
 import java.util.ArrayList;
 import java.util.List;
 
-@SuppressWarnings("Duplicates")
 public abstract class TemplateLanguageBlock extends AbstractBlock implements BlockEx, IndentInheritingBlock, BlockWithParent {
 
   protected final ASTNode myNode;

xml/impl/src/com/intellij/xml/template/formatter/TemplateXmlBlock.java

@@ -27,7 +27,6 @@ import org.jetbrains.annotations.NotNull;
 import java.util.ArrayList;
 import java.util.List;
 
-@SuppressWarnings("Duplicates")
 public class TemplateXmlBlock extends XmlBlock implements IndentInheritingBlock {
   private AbstractXmlTemplateFormattingModelBuilder myBuilder;
   private Indent myIndent;