git: nrelease: Remove obsolete targets and update the help

[Aaron LI]

commit aac6f66e3264dcf46d2146b19429f954b8d2b24b
Author: Aaron LI <aly at aaronly.me>
Date:   Sun Mar 3 20:27:17 2019 +0800

    nrelease: Remove obsolete targets and update the help
    
    The optional targets "installer" and "img" are obsolete and have no
    effects, so just remove them.
    
    Update the help text by adding the "nopkgs" optional target.

Summary of changes:
 nrelease/Makefile | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/aac6f66e3264dcf46d2146b19429f954b8d2b24b


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