[torque] Minor cleanups.

- Refine the type of 'hole'.
- Remove the mysterious 'receiver' definition.
- Remove the declaration of a non-existing Print function.

Bug: v8:7570
Change-Id: If093b456a9bc31c5673ada87f262c0cfcadf11ad
Reviewed-on: https://chromium-review.googlesource.com/1032737Reviewed-by: Tobias Tebbi <tebbi@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#52851}

src/builtins/base.tq

@@ -92,7 +92,7 @@ const kDetachedOperation: MessageTemplate =
 const kBadSortComparisonFunction: MessageTemplate =
     'MessageTemplate::kBadSortComparisonFunction';
 
-const hole: Object = 'TheHoleConstant()';
+const hole: Oddball = 'TheHoleConstant()';
 const null: Oddball = 'NullConstant()';
 const undefined: Oddball = 'UndefinedConstant()';
 const true: Boolean = 'TrueConstant()';
@@ -100,15 +100,12 @@ const false: Boolean = 'FalseConstant()';
 const yes: bit = 'Int32TrueConstant()';
 const no: bit = 'Int32FalseConstant()';
 
-const receiver: Object = 'receiver';
-
 const strict: LanguageMode =
     'SmiConstant(static_cast<int>(LanguageMode::kStrict))';
 const sloppy: LanguageMode =
     'SmiConstant(static_cast<int>(LanguageMode::kSloppy))';
 
 extern macro Print(Object);
-extern macro Print(String, Object);
 extern macro DebugBreak();
 extern macro ToInteger_Inline(Context, Object): Number;
 extern macro ToLength_Inline(Context, Object): Number;