[element model] migrate use_rethrow_when_possible

Bug: https://github.com/dart-lang/linter/issues/5099
Change-Id: Ia3a693d291b261c51268b2d75c84ed8bd2ef2dcc
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/391521
Commit-Queue: Brian Wilkerson <[email protected]>
Auto-Submit: Phil Quitslund <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: pq

pkg/linter/lib/src/rules/use_rethrow_when_possible.dart

@@ -37,11 +37,11 @@ class _Visitor extends SimpleAstVisitor<void> {
   void visitThrowExpression(ThrowExpression node) {
     if (node.parent is! ExpressionStatement) return;
 
-    var element = node.expression.canonicalElement;
+    var element = node.expression.canonicalElement2;
     if (element != null) {
       var catchClause = node.thisOrAncestorOfType<CatchClause>();
       var exceptionParameter =
-          catchClause?.exceptionParameter?.declaredElement?.canonicalElement;
+          catchClause?.exceptionParameter?.declaredElement2;
       if (element == exceptionParameter) {
         rule.reportLint(node);
       }