Revert of [builtins] Introduce proper Float64Exp operator.

test/unittests/compiler/machine-operator-reducer-unittest.cc

Index: test/unittests/compiler/machine-operator-reducer-unittest.cc
diff --git a/test/unittests/compiler/machine-operator-reducer-unittest.cc b/test/unittests/compiler/machine-operator-reducer-unittest.cc
index 2a161ce82d80da50c9d641493a22ec0f40bac654..9d7482af76df973f45b98cac3391179fa43cdecd 100644
--- a/test/unittests/compiler/machine-operator-reducer-unittest.cc
+++ b/test/unittests/compiler/machine-operator-reducer-unittest.cc
@@ -1448,19 +1448,6 @@
 }
 
 // -----------------------------------------------------------------------------
-// Float64Exp
-
-TEST_F(MachineOperatorReducerTest, Float64ExpWithConstant) {
-  TRACED_FOREACH(double, x, kFloat64Values) {
-    Reduction const r =
-        Reduce(graph()->NewNode(machine()->Float64Exp(), Float64Constant(x)));
-    ASSERT_TRUE(r.Changed());
-    EXPECT_THAT(r.replacement(),
-                IsFloat64Constant(NanSensitiveDoubleEq(base::ieee754::exp(x))));
-  }
-}
-
-// -----------------------------------------------------------------------------
 // Float64Log
 
 TEST_F(MachineOperatorReducerTest, Float64LogWithConstant) {