How to delete lion recovery partition

i have mac book air 13inch with 128g hdd
when i install lion, it creats lion recovery partition on my HDD
and it does not clear out and stays all the time
i want to delete the lion recovery partition and make my HDD united to only one partition
how can i do this?
it there any way to do this?
help me~~~

You could, but not recommended.  The recovery partition is
there so that you can repair or re-install Lion if necessary.
I don't recall, but I think some people have had issues with
some Mac models booting Lion if a Recovery HD is not
present.  Not sure if the Air is one.
First, to be safe, you should probably make a USB stick
installer or DVD for Lion should things go south on you and
have to reinstall from scratch.
Next,the simplest approach would be to clone your Lion
install to an external, bootable hard drive using either
Carbon Copy Cloner or Super Duper.  When that is
complete boot to that volume then reformat the internal
volume, then clone the external volume back.
Don't interrupt any of the processes or you could
end up with a MacBrick.

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