Remove tracking of factories used with type arguments.

pkg/compiler/lib/src/ssa/builder.dart

Index: pkg/compiler/lib/src/ssa/builder.dart
diff --git a/pkg/compiler/lib/src/ssa/builder.dart b/pkg/compiler/lib/src/ssa/builder.dart
index fe451e2d6796db789e657fda3c5368cc61d8fa25..f2ac807661c3f5a88f53516ba7ca35637624a88d 100644
--- a/pkg/compiler/lib/src/ssa/builder.dart
+++ b/pkg/compiler/lib/src/ssa/builder.dart
@@ -4305,11 +4305,6 @@ class SsaBuilder extends ResolvedVisitor {
                                          send.arguments,
                                          constructor.implementation));
 
-    if (constructor.isFactoryConstructor &&
-        !expectedType.typeArguments.isEmpty) {
-      registry.registerFactoryWithTypeArguments();
-    }
-
     TypeMask elementType = computeType(constructor);
     if (isFixedListConstructorCall) {
       if (!inputs[0].isNumber(compiler)) {
@@ -5418,10 +5413,6 @@ class SsaBuilder extends ResolvedVisitor {
         functionElement.computeEffectiveTargetType(type);
     expectedType = localsHandler.substInContext(expectedType);
 
-    if (constructor.isFactoryConstructor) {
-      registry.registerFactoryWithTypeArguments();
-    }
-
     ClassElement cls = constructor.enclosingClass;
 
     if (backend.classNeedsRti(cls)) {