base-files: don't export TZ="UTC" from /etc/profile
If no /etc/localtime (or /etc/TZ for uclibc) is found, then the libc
will default to UTC, so setting UTC as a fallback default via the TZ
environment variable is redundant.
Since having the TZ environment variable set causes /etc/localtime
to be ignored, it can cause confusion if /etc/localtime is added
interactively after /etc/profile has been run.
Signed-off-by: Andre McCurdy <armccurdy@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
