8371066: Remove unused class TextSourceLabel and associated class hierarchy

Reviewed-by: prr, psadhukhan

Author: Daniel Gredler

src/java.desktop/share/classes/java/awt/font/TextLine.java

@@ -1020,7 +1020,7 @@ public static TextLineComponent[] createComponentsOnRun(int runStart,
                 }
 
                 TextLineComponent nextComponent =
-                    factory.createExtended(font, cm, decorator, startPos, startPos + lmCount);
+                    factory.createTextLabel(font, cm, decorator, startPos, startPos + lmCount);
 
                 ++numComponents;
                 if (numComponents > components.length) {

src/java.desktop/share/classes/sun/font/Decoration.java

@@ -54,7 +54,8 @@
 /**
  * This class handles underlining, strikethrough, and foreground and
  * background styles on text.  Clients simply acquire instances
- * of this class and hand them off to ExtendedTextLabels or GraphicComponents.
+ * of this class and hand them off to ExtendedTextSourceLabels or
+ * GraphicComponents.
  */
 public class Decoration {