fix build

[bheavner]

Checking package Checking with: R CMD check minidtools_0.0.0.9001.tar.gz --as-cran --no-manual --no-manual --no-manual --no-manual --no-manual --no-manual --no-manual

• DONE Status: 1 WARNING See ‘/home/travis/build/bheavner/minidtools/minidtools.Rcheck/00check.log’ for details. 0.53schecking Rd metadata ... WARNING Rd files with duplicated alias 'as.list': ‘as.list-configuration-method.Rd’ ‘as.list-minid-method.Rd’