Revert "Introduce FX_Number class as a replacement for FX_atonum()."

This reverts commit a5d7ad3aa8feb08a14b5cca173d673054c1ade23.

Reason for revert: Speculative revert to get back before flake.

Original change's description:
> Introduce FX_Number class as a replacement for FX_atonum().
> 
> The issue with FX_atonum() is that it doesn't return any information
> about whether it range-checked its integer values as a signed or
> unsigned type, even though it knows this as part of its processing.
> 
> Rather than adding another out parameter to that function, create
> a class to hold all this information together.
> 
> This is the first place things went astray while diagnosing
> bug 882959, in that a large positive value was cast to float as a
> negative value. Unfortunately, this doesn't affect the related bug,
> but is a step in the right direction.
> 
> Change-Id: I0977ec8fccf85e2632a962507bdd30a1cbe6d33c
> Reviewed-on: https://pdfium-review.googlesource.com/42353
> Reviewed-by: Lei Zhang <thestig@chromium.org>
> Commit-Queue: Tom Sepez <tsepez@chromium.org>

TBR=thestig@chromium.org,tsepez@chromium.org

Change-Id: Ia56270c3daa80408fc2b23eb4384a77f03f45b82
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://pdfium-review.googlesource.com/42392
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 0 insertions, 39 deletions

diff --git a/core/fxcrt/fx_number.h b/core/fxcrt/fx_number.h
deleted file mode 100644
index 4c789b4130..0000000000
--- a/core/fxcrt/fx_number.h
+++ /dev/null
@@ -1,39 +0,0 @@
-// Copyright 2018 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#ifndef CORE_FXCRT_FX_NUMBER_H_
-#define CORE_FXCRT_FX_NUMBER_H_
-
-#include <stdint.h>
-
-#include "core/fxcrt/bytestring.h"
-
-class FX_Number {
- public:
-  FX_Number();
-  explicit FX_Number(uint32_t value);
-  explicit FX_Number(int32_t value);
-  explicit FX_Number(float value);
-  explicit FX_Number(const ByteStringView& str);
-
-  bool IsInteger() const { return m_bInteger; }
-  bool IsSigned() const { return m_bSigned; }
-
-  uint32_t GetUnsigned() const;  // Underflow possible.
-  int32_t GetSigned() const;     // Underflow/Overflow possible.
-  float GetFloat() const;
-
- private:
-  bool m_bInteger;  // One of the two integers vs. float type.
-  bool m_bSigned;   // Only valid if |m_bInteger|.
-  union {
-    uint32_t m_UnsignedValue;
-    int32_t m_SignedValue;
-    float m_FloatValue;
-  };
-};
-
-#endif  // CORE_FXCRT_FX_NUMBER_H_