Drop "left in" debugging var_dump from WikiImporter

I found this on accident when searching for a var_dump I forgot
somewhere in my own code. We are maintaining production code here,
right? Debugging and testing should be somewhere else.

Also note the stray print before the var_dump.

Change-Id: I98725b277039f55db9ff95399e9559a477b43c26
Merge "Drop "left in" debugging var_dump from WikiImporter"