Remove duplicate of clang + libc++ mkspec

The same funcionality is already supported, so we avoid confusion.
The corresponding mkspec is name "linux-clang-libc++"

Change-Id: Ib087595298b48c73ad5da8d92cca2d1bac89f2be
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>

mkspecs/unsupported/linux-libc++-clang/qmake.conf

@@ -1,20 +0,0 @@
-#
-# qmake configuration for linux-clang
-#
-
-MAKEFILE_GENERATOR = UNIX
-CONFIG += incremental
-
-QMAKE_INCREMENTAL_STYLE = sublib
-
-include(../../common/linux.conf)
-include(../../common/gcc-base-unix.conf)
-include(../../common/clang.conf)
-
-QMAKE_CFLAGS_RELEASE = -Os
-QMAKE_CXXFLAGS_RELEASE = $$QMAKE_CFLAGS_RELEASE
-
-QMAKE_CXXFLAGS_CXX11 += -std=c++11 -stdlib=libc++
-QMAKE_LFLAGS_CXX11   += -stdlib=libc++ -lc++abi
-
-load(qt_config)

mkspecs/unsupported/linux-libc++-clang/qplatformdefs.h

@@ -1,92 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** This file is part of the qmake spec of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL21$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and Digia. For licensing terms and
-** conditions see http://qt.digia.com/licensing. For further information
-** use the contact form at http://qt.digia.com/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 or version 3 as published by the Free
-** Software Foundation and appearing in the file LICENSE.LGPLv21 and
-** LICENSE.LGPLv3 included in the packaging of this file. Please review the
-** following information to ensure the GNU Lesser General Public License
-** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Digia gives you certain additional
-** rights. These rights are described in the Digia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QPLATFORMDEFS_H
-#define QPLATFORMDEFS_H
-
-// Get Qt defines/settings
-
-#include "qglobal.h"
-
-// Set any POSIX/XOPEN defines at the top of this file to turn on specific APIs
-
-// 1) need to reset default environment if _BSD_SOURCE is defined
-// 2) need to specify POSIX thread interfaces explicitly in glibc 2.0
-// 3) it seems older glibc need this to include the X/Open stuff
-#ifndef _GNU_SOURCE
-#  define _GNU_SOURCE
-#endif
-
-#include <unistd.h>
-
-
-// We are hot - unistd.h should have turned on the specific APIs we requested
-
-#include <features.h>
-#include <pthread.h>
-#include <dirent.h>
-#include <fcntl.h>
-#include <grp.h>
-#include <pwd.h>
-#include <signal.h>
-
-#include <sys/types.h>
-#include <sys/ioctl.h>
-#include <sys/ipc.h>
-#include <sys/time.h>
-#include <sys/shm.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <sys/wait.h>
-#include <netinet/in.h>
-#ifndef QT_NO_IPV6IFNAME
-#include <net/if.h>
-#endif
-
-#define QT_USE_XOPEN_LFS_EXTENSIONS
-#include "../../common/posix/qplatformdefs.h"
-
-#undef QT_SOCKLEN_T
-
-#if defined(__GLIBC__) && (__GLIBC__ >= 2)
-#define QT_SOCKLEN_T            socklen_t
-#else
-#define QT_SOCKLEN_T            int
-#endif
-
-#if defined(_XOPEN_SOURCE) && (_XOPEN_SOURCE >= 500)
-#define QT_SNPRINTF             ::snprintf
-#define QT_VSNPRINTF            ::vsnprintf
-#endif
-
-#endif // QPLATFORMDEFS_H