[GRASS-git] [OSGeo/grass] cb8293: configure: remove pdal cppflags (#2749)

[Nicklas Larsson]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: cb8293e8d40c02857b3a15bac441f703339ba5fd
      https://github.com/OSGeo/grass/commit/cb8293e8d40c02857b3a15bac441f703339ba5fd
  Author: Nicklas Larsson <n_larsson at yahoo.com>
  Date:   2023-01-18 (Wed, 18 Jan 2023)

  Changed paths:
    M configure
    M configure.ac
    M include/Make/Platform.make.in
    M raster/r.in.pdal/Makefile
    M vector/v.in.pdal/Makefile

  Log Message:
  -----------
  configure: remove pdal cppflags (#2749)

Upstream pdal-config is outdated returning hardcoded  "-std=c++11",
while C++17 is in fact needed.

* configure: remove pdal cppflags
* remove remaining instances of PDAL_CPPFLAGS