win specific: remove winlibs/lib

in windows ,as the qwebengine using the vs environment.
that means all the files in winlibs/lib are useless.
you will have no chance to use it at current situation.

qtsingleapplication/config.pri

@@ -1 +0,0 @@
-SOLUTIONS_LIBRARY = yes

winlibs/lib/libao.la

@@ -1,41 +0,0 @@
-# libao.la - a libtool library file
-# Generated by libtool (GNU libtool) 2.4.2
-#
-# Please DO NOT delete this file!
-# It is necessary for linking the library.
-
-# The name that we can dlopen(3).
-dlname='libao-4.dll'
-
-# Names of this library.
-library_names='libao.dll.a'
-
-# The name of the static archive.
-old_library=''
-
-# Linker flags that can not go in dependency_libs.
-inherited_linker_flags=''
-
-# Libraries that this one depends upon.
-dependency_libs=' -lpthread'
-
-# Names of additional weak libraries provided by this library
-weak_library_names=''
-
-# Version information for libao.
-current=5
-age=1
-revision=0
-
-# Is this an already installed library?
-installed=no
-
-# Should we warn about portability when linking against -modules?
-shouldnotlink=no
-
-# Files to dlopen/dlpreopen
-dlopen=''
-dlpreopen=''
-
-# Directory that this library needs to be installed in:
-libdir='/mingw64/lib'

winlibs/lib/libao.lai

@@ -1,41 +0,0 @@
-# libao.la - a libtool library file
-# Generated by libtool (GNU libtool) 2.4.2
-#
-# Please DO NOT delete this file!
-# It is necessary for linking the library.
-
-# The name that we can dlopen(3).
-dlname='../bin/libao-4.dll'
-
-# Names of this library.
-library_names='libao.dll.a'
-
-# The name of the static archive.
-old_library=''
-
-# Linker flags that can not go in dependency_libs.
-inherited_linker_flags=''
-
-# Libraries that this one depends upon.
-dependency_libs=' -lpthread'
-
-# Names of additional weak libraries provided by this library
-weak_library_names=''
-
-# Version information for libao.
-current=5
-age=1
-revision=0
-
-# Is this an already installed library?
-installed=yes
-
-# Should we warn about portability when linking against -modules?
-shouldnotlink=no
-
-# Files to dlopen/dlpreopen
-dlopen=''
-dlpreopen=''
-
-# Directory that this library needs to be installed in:
-libdir='/mingw64/lib'