Remove EngineTestCase.createSource().

pkg/analyzer/test/generated/test_support.dart

Index: pkg/analyzer/test/generated/test_support.dart
diff --git a/pkg/analyzer/test/generated/test_support.dart b/pkg/analyzer/test/generated/test_support.dart
index de6757b7f7f969bcc3a99612ae789abcc30bcc50..da4a6baee14cc463c58a869060d8332859bd398d 100644
--- a/pkg/analyzer/test/generated/test_support.dart
+++ b/pkg/analyzer/test/generated/test_support.dart
@@ -419,20 +419,6 @@ class EngineTestCase extends JUnitTestCase {
   }
 
   /**
-   * Convert the given array of lines into a single source string.
-   *
-   * @param lines the lines to be merged into a single source string
-   * @return the source string composed of the given lines
-   */
-  static String createSource(List<String> lines) {
-    StringBuffer buffer = new StringBuffer();
-    for (String line in lines) {
-      buffer.writeln(line);
-    }
-    return buffer.toString();
-  }
-
-  /**
    * @return the [AstNode] with requested type at offset of the "prefix".
    */
   static AstNode findNode(AstNode root, String code, String prefix,