Remove erroneous BOM
Remove erroneous BOM

Closes WordPress-Coding-Standards/WordPress-Coding-Standards#38

$ grep -rl $'\xEF\xBB\xBF' .
./Sniffs/WhiteSpace/OperatorSpacingSniff.php

xwp/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,jrfnl/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,jrfnl/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,lkraav/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,xwp/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,mattyrob/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,lkraav/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,jrfnl/WordPress-Coding-Standards,borkweb/WordPress-Coding-Standards,xwp/WordPress-Coding-Standards,xwp/WordPress-Coding-Standards,jrfnl/WordPress-Coding-Standards,WordPress-Coding-Standards/WordPress-Coding-Standards,mediarain/WordPress-Coding-Standards,paulschreiber/WordPress-Coding-Standards,mediarain/WordPress-Coding-Standards