Remove GYP files.

third_party/libpng/libpng.gyp

Index: third_party/libpng/libpng.gyp
diff --git a/third_party/libpng/libpng.gyp b/third_party/libpng/libpng.gyp
deleted file mode 100644
index 3c42401baa89318fbe6fc7abf80284e1d8e50e85..0000000000000000000000000000000000000000
--- a/third_party/libpng/libpng.gyp
+++ /dev/null
@@ -1,111 +0,0 @@
-# Copyright (c) 2012 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.
-
-{
-  'targets': [
-    {
-      'target_name': 'libpng',
-      'dependencies': [
-        '../zlib/zlib.gyp:zlib',
-      ],
-      'variables': {
-        # libpng checks that the width is not greater than PNG_SIZE_MAX.
-        # On platforms where size_t is 64-bits, this comparison will always
-        # be false.
-        'clang_warning_flags': [ '-Wno-tautological-constant-out-of-range-compare' ],
-      },
-      'sources': [
-        'png.c',
-        'png.h',
-        'pngconf.h',
-        'pngerror.c',
-        'pngget.c',
-        'pnginfo.h',
-        'pnglibconf.h',
-        'pngmem.c',
-        'pngpread.c',
-        'pngprefix.h',
-        'pngpriv.h',
-        'pngread.c',
-        'pngrio.c',
-        'pngrtran.c',
-        'pngrutil.c',
-        'pngset.c',
-        'pngstruct.h',
-        'pngtrans.c',
-        'pngwio.c',
-        'pngwrite.c',
-        'pngwtran.c',
-        'pngwutil.c',
-      ],
-      'direct_dependent_settings': {
-        'include_dirs': [
-          '.',
-        ],
-      },
-      'export_dependent_settings': [
-        '../zlib/zlib.gyp:zlib',
-      ],
-      'msvs_disabled_warnings': [
-        4267, # TODO(jschuh): http://crbug.com/167187
-        4146, # Unary minus applied to unsigned type.
-      ],
-      'conditions': [
-        # Disable ARM optimizations on IOS.  Can't find a way to get gyp to even try
-        # to compile the optimization files.  This works fine on GN.
-        [ 'OS=="ios"', {
-          'defines': [
-            'PNG_ARM_NEON_OPT=0',
-          ],
-        }],
-
-        # SSE optimizations
-        [ 'target_arch=="ia32" or target_arch=="x64"', {
-          'defines': [
-            'PNG_INTEL_SSE_OPT=1',
-          ],
-          'sources': [
-            'contrib/intel/intel_init.c',
-            'contrib/intel/filter_sse2_intrinsics.c',
-          ],
-        }],
-
-        # ARM optimizations
-        [ '(target_arch=="arm" or target_arch=="arm64") and OS!="ios" and arm_neon==1', {
-          'defines': [
-            'PNG_ARM_NEON_OPT=2',
-            'PNG_ARM_NEON_IMPLEMENTATION=1',
-          ],
-          'sources': [
-            'arm/arm_init.c',
-            'arm/filter_neon_intrinsics.c',
-          ],
-        }],
-      
-        ['OS!="win"', {'product_name': 'png'}],
-        ['OS=="win"', {
-          'type': '<(component)',
-        }, {
-          # Chromium libpng does not support building as a shared_library
-          # on non-Windows platforms.
-          'type': 'static_library',
-        }],
-        ['OS=="win" and component=="shared_library"', {
-          'defines': [
-            'PNG_BUILD_DLL',
-            'PNG_NO_MODULEDEF',
-          ],
-          'direct_dependent_settings': {
-            'defines': [
-              'PNG_USE_DLL',
-            ],
-          },
-        }],
-        ['OS=="android"', {
-          'toolsets': ['target', 'host'],
-        }],
-      ],
-    },
-  ]
-}