Revert of [builtins] Introduce proper Float64Exp operator.

test/unittests/compiler/js-builtin-reducer-unittest.cc

Index: test/unittests/compiler/js-builtin-reducer-unittest.cc
diff --git a/test/unittests/compiler/js-builtin-reducer-unittest.cc b/test/unittests/compiler/js-builtin-reducer-unittest.cc
index 60d996cca2a1b0f7e8f4460a5484e002b2d01a04..5ec29c45e9b2912f3a16cc6b0a9d28ca02972fac 100644
--- a/test/unittests/compiler/js-builtin-reducer-unittest.cc
+++ b/test/unittests/compiler/js-builtin-reducer-unittest.cc
@@ -264,45 +264,6 @@
 }
 
 // -----------------------------------------------------------------------------
-// Math.exp
-
-TEST_F(JSBuiltinReducerTest, MathExpWithNumber) {
-  Node* function = MathFunction("exp");
-
-  Node* effect = graph()->start();
-  Node* control = graph()->start();
-  Node* context = UndefinedConstant();
-  Node* frame_state = graph()->start();
-  TRACED_FOREACH(Type*, t0, kNumberTypes) {
-    Node* p0 = Parameter(t0, 0);
-    Node* call = graph()->NewNode(javascript()->CallFunction(3), function,
-                                  UndefinedConstant(), p0, context, frame_state,
-                                  effect, control);
-    Reduction r = Reduce(call);
-
-    ASSERT_TRUE(r.Changed());
-    EXPECT_THAT(r.replacement(), IsNumberExp(p0));
-  }
-}
-
-TEST_F(JSBuiltinReducerTest, MathExpWithPlainPrimitive) {
-  Node* function = MathFunction("exp");
-
-  Node* effect = graph()->start();
-  Node* control = graph()->start();
-  Node* context = UndefinedConstant();
-  Node* frame_state = graph()->start();
-  Node* p0 = Parameter(Type::PlainPrimitive(), 0);
-  Node* call = graph()->NewNode(javascript()->CallFunction(3), function,
-                                UndefinedConstant(), p0, context, frame_state,
-                                effect, control);
-  Reduction r = Reduce(call);
-
-  ASSERT_TRUE(r.Changed());
-  EXPECT_THAT(r.replacement(), IsNumberExp(IsPlainPrimitiveToNumber(p0)));
-}
-
-// -----------------------------------------------------------------------------
 // Math.floor
 
 TEST_F(JSBuiltinReducerTest, MathFloorWithNumber) {