[OTS] Remove redundant "else if" in cff.cc
[OTS] Remove redundant "else if" in cff.cc

BUG=chromium:93655
TEST=ran test_{un,}malicious_fonts.sh
Review URL: https://chromiumcodereview.appspot.com/9796014
jgedler/ots,jgedler/ots,a19810227/ots,a19810227/ots,jgedler/ots,a19810227/ots