Remove duplicate rows from 2018 Sacramento County general file

[warwickmm]

This removes rows that are duplicates of lines 11291-11887:

https://github.com/openelections/openelections-data-ca/blob/5ee9b6ca8727d66e65c1c4aa7c92e3e3146886da/2018/counties/20181106__ca__general__sacramento__precinct.csv#L11291-L11887

These appear to truly be duplicates, as opposed to being the result of parsing errors.