obmc-phosphor-image: disable /etc/version file

The /etc/version file is created by image generation with the timestamp
of when the image was built.  This is not useful to users and they
should instead use /etc/os-release.  There appears to be no way to
disable the version file.  Per the following email, delete it as
part of the ROOTFS_POSTPROCESS_COMMAND:
    https://www.mail-archive.com/yocto@yoctoproject.org/msg33555.html

Fixes openbmc/openbmc#1232.

Change-Id: I78b3f31477c8490312be253eb363c4aafadf486c
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
1 file changed
tree: fa81685499843ac16bba554afc579d32dc6ce6aa
  1. classes/
  2. common/
  3. conf/
  4. COPYING.apache-2.0
  5. COPYING.MIT
  6. LICENSE