Remove the checked-in scons configuration files.

third_party/libpng/libpng.scons

Index: third_party/libpng/libpng.scons
===================================================================
--- third_party/libpng/libpng.scons	(revision 12583)
+++ third_party/libpng/libpng.scons	(working copy)
@@ -1,97 +0,0 @@
-# Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-
-__doc__ = """
-Configuration for building libpng.lib / libpng.a.
-"""
-
-Import('env')
-
-if env.WantSystemLib('libpng'):
-  Return()
-
-env = env.Clone()
-
-env.ApplySConscript([
-    '$ZLIB_DIR/using_zlib.scons',
-])
-
-env.Prepend(
-    CPPPATH = [
-        '$CHROME_SRC_DIR',
-    ],
-)
-
-if env.Bit('windows'):
-  env.Append(
-      CCFLAGS = [
-          '/TP',
-          '/wd4800',
-      ],
-  )
-
-env.Append(
-    CPPDEFINES = [
-        'PNG_USER_CONFIG',
-        'CHROME_PNG_WRITE_SUPPORT',
-    ],
-)
-
-input_files = ChromeFileList([
-    'png.c',
-    'png.h',
-    'pngconf.h',
-    'pngerror.c',
-    'pnggccrd.c',
-    'pngget.c',
-    'pngmem.c',
-    'pngpread.c',
-    'pngread.c',
-    'pngrio.c',
-    'pngrtran.c',
-    'pngrutil.c',
-    'pngset.c',
-    'pngtrans.c',
-    'pngusr.h',
-    'pngvcrd.c',
-    'pngwio.c',
-    'pngwrite.c',
-    'pngwtran.c',
-    'pngwutil.c',
-])
-
-env.ChromeLibrary('libpng', input_files)
-
-p = env.ChromeMSVSProject('libpng.vcproj',
-                          dest=('$CHROME_SRC_DIR/third_party/'
-                                + 'libpng/libpng.vcproj'),
-                          guid='{C564F145-9172-42C3-BFCB-6014CA97DBCD}',
-                          keyword='Win32Proj',
-                          files=input_files,
-                          relative_path_prefix='./',
-                          tools = [
-                              'VCLibrarianTool',
-                              'VCCLCompilerTool',
-                          ])
-
-p.AddConfig('Debug|Win32',
-            ConfigurationType = '4',
-            InheritedPropertySheets = [
-                '$(SolutionDir)../build/common.vsprops',
-                '$(SolutionDir)../build/debug.vsprops',
-                '$(SolutionDir)../third_party/zlib/using_zlib.vsprops',
-                '$(SolutionDir)../build/external_code.vsprops',
-                '$(SolutionDir)../third_party/libpng/using_libpng.vsprops',
-            ])
-
-p.AddConfig('Release|Win32',
-            ConfigurationType = '4',
-            InheritedPropertySheets = [
-                '$(SolutionDir)../build/common.vsprops',
-                '$(SolutionDir)../build/release.vsprops',
-                '$(SolutionDir)../third_party/zlib/using_zlib.vsprops',
-                '$(SolutionDir)../build/external_code.vsprops',
-                '$(SolutionDir)../third_party/libpng/using_libpng.vsprops',
-            ])