Investigate bootchartd poking with arguments

[xrmx]

130d775 introduced reading the value of bootchart_init from an environment variable. Since this is a lot cleaner that looping on arguments i think we should investigate if the old code may be safely removed.

This is an excerpt of his findings:

bootparam(7) says that all parameters interpreted by the kernel are
stripped. That means, init=blah never makes it to bootchartd. Unless
using an initrd (which I am not) somehow depends on it, I think the
entire for-loop can go without checking $init at all.

This is also what I observe (now on Linux 3.0-rc1 :-)). The exact
(perhaps not very exciting) details follow. My kernel command line is:

root=/dev/sda3 ro init=/sbin/bootchartd resume=/dev/sda2 initcall_debug printk.time=y bootchart_init=/bin/systemd

Bootchartd has the following environment variables set (by calling "env"
just before checking for $bootchart_init):

TERM=linux
PWD=/
bootchart_init=/bin/systemd
SHLVL=1
HOME=/
BOOT_IMAGE=/vmlinuz-3.0.0-rc1
_=/bin/env

And $@ is empty.