plugins/spdk: drop the plugin

The plugin depends on the private header of libvnme and breaks the build
if the library is not a builtin dependency.

Signed-off-by: Daniel Wagner <dwagner@suse.de>

Author: igaw

plugins/meson.build

@@ -19,7 +19,6 @@ if json_c_dep.found()
     'plugins/seagate/seagate-nvme.c',
     'plugins/shannon/shannon-nvme.c',
     'plugins/solidigm/solidigm-nvme.c',
-    'plugins/spdk/spdk-nvme.c',
     'plugins/toshiba/toshiba-nvme.c',
     'plugins/transcend/transcend-nvme.c',
     'plugins/virtium/virtium-nvme.c',