Remove unnecessary newText field from the SnippetTextEdit.

- SnippetTextEdit inherits from TextEdit, but it should not initialize
  'newText' to an empty String when the 'snippet' field will have the
  text defined

Signed-off-by: Roland Grunberg <[email protected]>

org.eclipse.jdt.ls.core/src/org/eclipse/lsp4j/extended/SnippetTextEdit.java

@@ -20,7 +20,8 @@ public class SnippetTextEdit extends TextEdit {
  StringValue snippet;
 
  public SnippetTextEdit(Range range, String snippet) {
- super(range, "");
+ super();
+ setRange(range);
  this.snippet = new StringValue(snippet);
  }