Well, it will not work just by removing labelfield you need to remove label as well. both works in conjunction.
labelfield
Syntax: labelfield=<fieldname>
Description: Specify a field name to add to the result set.
Default: none
label
Syntax: label=<string>
Description: Used with the labelfield argument to add a label in the summary event. If the labelfield argument is absent, the label argument has no effect.
Default: Total
Look at this doc for more info
http://docs.splunk.com/Documentation/Splunk/7.0.3/SearchReference/Addcoltotals
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