Unwanted barline. How to get rid of it?

[Robert Blackstone]

Dear all,

In one of the pieces that I'm presently typesetting there appears, near the 
end, after a repeat, a barline that should not be there. (See the MWE below)

How can I either get rid of it or else hide it?
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\version "2.18.2"


{    \relative c { 
       \clef bass
       \key c \major
       \time 6/8

        \repeat volta 2 {\partial 8 
        c'8
         c4. c |
         c c | 
         c r4    |
         }
        
         c4.~  c \bar "|." 
         }
}
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Thanks in advance for any advice,

Best regards,
Robert Blackstone