Revert D28841011: [TensorExpr] Fix printing of Bool dtype.

Test Plan: revert-hammer

Differential Revision:
D28841011 (pytorch@19985d6)

Original commit changeset: 9f68dd47e14a

fbshipit-source-id: ff517cfff49e46ed513e79eabbe9e9fd246ccce8

Author: malfet

torch/csrc/jit/tensorexpr/types.cpp

@@ -72,10 +72,8 @@ std::string Dtype::ToCppString() const {
 #define TYPE_CASE(t, n) \
   case ScalarType::n:   \
     return #t;
-    AT_FORALL_SCALAR_TYPES(TYPE_CASE);
+    AT_FORALL_SCALAR_TYPES_AND(Bool, TYPE_CASE);
 #undef TYPE_CASE
-    case ScalarType::Bool:
-      return "bool";
     case ScalarType::Half:
       return "half";
     default: