Delete incorrect invalid map CTS tests.

Delete incorrect invalid map CTS tests.

The citation given in these tests comes from the OpenGL man pages, which
are not authoritative.  The ES 3.2 and GL 4.x specifications say:

   "Effects of Mapping Buffers on Other GL Commands

    Any GL command which attempts to read from, write to, or change the
    state of a buffer object may generate an INVALID_OPERATION error if
    all or part of the buffer object is mapped. However, only commands
    which explicitly describe this error are required to do so. If an
    error is not generated, using such commands to perform invalid
    reads, writes, or state changes will have undefined results and may
    result in GL interruption or termination."

Importantly, it says "_may_ generate an INVALID_OPERATION error".  Some
drivers choose not to implement this to avoid the CPU overhead required
to enforce this optional restriction.

Affects:
- KHR-*.draw_elements_base_vertex_tests.invalid_mapped_bos

VK-GL-CTS issue: 682

Components: OpenGL

Change-Id: I4c0f7785ca7a747145591d071dda6e5231c787d4
(cherry picked from commit 6a50dd2a2cd0a3f867fe6bdabbf8dc9fb678fb99)