mesa: drop APPLE_vertex_array_object support

Shared context support for VAOs was dropped in 0b2750620b.

From the ARB_vertex_array_object spec:

   "This extension differs from GL_APPLE_vertex_array_object
   in that client memory cannot be accessed through a
   non-zero vertex array object.  It also differs in that
   vertex array objects are explicitly not sharable between
   contexts."

Nobody should be using this extension over
ARB_vertex_array_object anymore so just drop it rather than
adding locking back just for VAOs created from these
functions.

For reference the Nvidia blob doesn't expose this extension.

Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>

src/mapi/glapi/tests/check_table.cpp

@@ -1404,9 +1404,7 @@ const struct name_offset known_dispatch[] = {
    { "glPointParameteri", _O(PointParameteri) },
    { "glPointParameteriv", _O(PointParameteriv) },
    { "glActiveStencilFaceEXT", _O(ActiveStencilFaceEXT) },
-   { "glBindVertexArrayAPPLE", _O(BindVertexArrayAPPLE) },
    { "glDeleteVertexArrays", _O(DeleteVertexArrays) },
-   { "glGenVertexArraysAPPLE", _O(GenVertexArraysAPPLE) },
    { "glIsVertexArray", _O(IsVertexArray) },
    { "glGetProgramNamedParameterdvNV", _O(GetProgramNamedParameterdvNV) },
    { "glGetProgramNamedParameterfvNV", _O(GetProgramNamedParameterfvNV) },