Remove some (but not all) unused methods in analyzer.

pkg/analyzer/lib/src/generated/element.dart

Index: pkg/analyzer/lib/src/generated/element.dart
diff --git a/pkg/analyzer/lib/src/generated/element.dart b/pkg/analyzer/lib/src/generated/element.dart
index 58710601cee2240373d18192cf099f1bc02e43c2..617faf3ff742ecb6b6f7ac72fe4ac41782afa1cd 100644
--- a/pkg/analyzer/lib/src/generated/element.dart
+++ b/pkg/analyzer/lib/src/generated/element.dart
@@ -6812,44 +6812,6 @@ class InterfaceTypeImpl extends TypeImpl implements InterfaceType {
   }
 
   /**
-   * Return the "least upper bound" of the given types under the assumption that the types have the
-   * same element and differ only in terms of the type arguments. The resulting type is composed by
-   * comparing the corresponding type arguments, keeping those that are the same, and using
-   * 'dynamic' for those that are different.
-   *
-   * @param firstType the first type
-   * @param secondType the second type
-   * @return the "least upper bound" of the given types
-   */
-  static InterfaceType _leastUpperBound(InterfaceType firstType, InterfaceType secondType) {
-    if (firstType == secondType) {
-      return firstType;
-    }
-    List<DartType> firstArguments = firstType.typeArguments;
-    List<DartType> secondArguments = secondType.typeArguments;
-    int argumentCount = firstArguments.length;
-    if (argumentCount == 0) {
-      return firstType;
-    }
-    List<DartType> lubArguments = new List<DartType>(argumentCount);
-    for (int i = 0; i < argumentCount; i++) {
-      //
-      // Ideally we would take the least upper bound of the two argument types, but this can cause
-      // an infinite recursion (such as when finding the least upper bound of String and num).
-      //
-      if (firstArguments[i] == secondArguments[i]) {
-        lubArguments[i] = firstArguments[i];
-      }
-      if (lubArguments[i] == null) {
-        lubArguments[i] = DynamicTypeImpl.instance;
-      }
-    }
-    InterfaceTypeImpl lub = new InterfaceTypeImpl.con1(firstType.element);
-    lub.typeArguments = lubArguments;
-    return lub;
-  }
-
-  /**
    * An array containing the actual types of the type arguments.
    */
   List<DartType> typeArguments = TypeImpl.EMPTY_ARRAY;