Elements. Remove V1 LibraryImportElement.

Change-Id: I4e4c4affd3edef452ece80133f32a2d7dacc1511
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/423441
Reviewed-by: Brian Wilkerson <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analyzer/api.txt

@@ -3144,13 +3144,6 @@ package:analyzer/dart/element/element.dart:
     topLevelElements (getter: Iterable<Element>)
     typeProvider (getter: TypeProvider)
     typeSystem (getter: TypeSystem)
-  LibraryImportElement (class extends Object implements _ExistingElement, deprecated):
-    new (constructor: LibraryImportElement Function())
-    combinators (getter: List<NamespaceCombinator>)
-    importKeywordOffset (getter: int)
-    importedLibrary (getter: LibraryElement?)
-    namespace (getter: Namespace)
-    uri (getter: DirectiveUri)
   LibraryLanguageVersion (class extends Object):
     new (constructor: LibraryLanguageVersion Function({required Version? override, required Version package}))
     effective (getter: Version)

pkg/analyzer/lib/dart/element/element.dart

@@ -793,28 +793,6 @@ abstract class LibraryElement implements _ExistingElement {
   TypeSystem get typeSystem;
 }
 
-/// A single import directive within a library.
-///
-/// Clients may not extend, implement or mix-in this class.
-@Deprecated('Use LibraryImport instead')
-abstract class LibraryImportElement implements _ExistingElement {
-  /// The combinators that were specified as part of the `import` directive in
-  /// the order in which they were specified.
-  List<NamespaceCombinator> get combinators;
-
-  /// The [LibraryElement], if [uri] is a [DirectiveUriWithLibrary].
-  LibraryElement? get importedLibrary;
-
-  /// The offset of the `import` keyword.
-  int get importKeywordOffset;
-
-  /// The [Namespace] that this directive contributes to the containing library.
-  Namespace get namespace;
-
-  /// The interpretation of the URI specified in the directive.
-  DirectiveUri get uri;
-}
-
 class LibraryLanguageVersion {
   /// The version for the whole package that contains this library.
   final Version package;