MAINT: Remove write to .txt file in to_latex test
MAINT: Remove write to .txt file in to_latex test

A vestige of gh-17960.  Should have been removed before merge.
toobaz/pandas,jreback/pandas,cbertinato/pandas,TomAugspurger/pandas,harisbal/pandas,cython-testbed/pandas,GuessWhoSamFoo/pandas,dsm054/pandas,zfrenchee/pandas,louispotok/pandas,cbertinato/pandas,rs2/pandas,kdebrab/pandas,jorisvandenbossche/pandas,jreback/pandas,gfyoung/pandas,cbertinato/pandas,MJuddBooth/pandas,harisbal/pandas,jorisvandenbossche/pandas,pandas-dev/pandas,amolkahat/pandas,jreback/pandas,jorisvandenbossche/pandas,dsm054/pandas,toobaz/pandas,datapythonista/pandas,GuessWhoSamFoo/pandas,gfyoung/pandas,cython-testbed/pandas,kdebrab/pandas,MJuddBooth/pandas,pratapvardhan/pandas,datapythonista/pandas,jreback/pandas,toobaz/pandas,rs2/pandas,gfyoung/pandas,dsm054/pandas,louispotok/pandas,louispotok/pandas,cbertinato/pandas,pratapvardhan/pandas,louispotok/pandas,MJuddBooth/pandas,harisbal/pandas,TomAugspurger/pandas,zfrenchee/pandas,datapythonista/pandas,zfrenchee/pandas,kdebrab/pandas,toobaz/pandas,GuessWhoSamFoo/pandas,harisbal/pandas,datapythonista/pandas,jreback/pandas,cython-testbed/pandas,amolkahat/pandas,dsm054/pandas,toobaz/pandas,pratapvardhan/pandas,cython-testbed/pandas,louispotok/pandas,harisbal/pandas,gfyoung/pandas,amolkahat/pandas,GuessWhoSamFoo/pandas,dsm054/pandas,amolkahat/pandas,kdebrab/pandas,pratapvardhan/pandas,cbertinato/pandas,cython-testbed/pandas,jorisvandenbossche/pandas,pratapvardhan/pandas,gfyoung/pandas,kdebrab/pandas,amolkahat/pandas,pandas-dev/pandas,rs2/pandas,GuessWhoSamFoo/pandas,MJuddBooth/pandas,TomAugspurger/pandas,MJuddBooth/pandas,zfrenchee/pandas,TomAugspurger/pandas,zfrenchee/pandas,rs2/pandas,pandas-dev/pandas,pandas-dev/pandas