[turbofan] Revert invalid optimization of flooring division.

src/compiler/typed-optimization.cc

Index: src/compiler/typed-optimization.cc
diff --git a/src/compiler/typed-optimization.cc b/src/compiler/typed-optimization.cc
index bc0d80ade0aeaf8df83cb9d2caefa9dcbf388019..76ae9d48ec1b714066c539c5451eb89fe327e8ba 100644
--- a/src/compiler/typed-optimization.cc
+++ b/src/compiler/typed-optimization.cc
@@ -219,11 +219,6 @@ Reduction TypedOptimization::ReduceNumberFloor(Node* node) {
       NodeProperties::SetType(node, lhs_type);
       return Changed(node);
     }
-    if (lhs_type->Is(Type::Signed32()) && rhs_type->Is(Type::Unsigned32())) {
-      NodeProperties::ChangeOp(node, simplified()->NumberToInt32());
-      NodeProperties::SetType(node, lhs_type);
-      return Changed(node);
-    }
   }
   return NoChange();
 }