Remove GYP files.

third_party/minigbm/minigbm.gyp

-# Copyright 2015 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.
-
-{
-  'variables': {
-    'use_system_minigbm%': 0,
-  },
-  'conditions': [
-    ['use_system_minigbm==0', {
-      'targets': [
-        {
-          'target_name': 'minigbm',
-          'type': 'shared_library',
-          'dependencies' : [
-            '../../build/linux/system.gyp:libdrm',
-          ],
-          'sources': [
-            'src/cirrus.c',
-            'src/evdi.c',
-            'src/exynos.c',
-            'src/gbm.c',
-            'src/gma500.c',
-            'src/helpers.c',
-            'src/i915.c',
-            'src/marvell.c',
-            'src/mediatek.c',
-            'src/rockchip.c',
-            'src/tegra.c',
-            'src/udl.c',
-            'src/virtio_gpu.c',
-          ],
-          'include_dirs': [
-            'src',
-          ],
-          'direct_dependent_settings': {
-            'include_dirs': [
-               'src',
-            ],
-          },
-        },
-      ],
-    }, { # 'use_system_minigbm!=0
-      'targets': [
-        {
-          'target_name': 'minigbm',
-          'type': 'none',
-          'direct_dependent_settings': {
-            'cflags': [
-              '<!@(<(pkg-config) --cflags gbm)',
-            ],
-          },
-          'link_settings': {
-            'ldflags': [
-              '<!@(<(pkg-config) --libs-only-L --libs-only-other gbm)',
-            ],
-            'libraries': [
-              '<!@(<(pkg-config) --libs-only-l gbm)',
-            ],
-          },
-        },
-      ],
-    }],
-  ],
-}