Remove unused variable

6 jobs from kill-goolist in 9 minutes and 3 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #58242
build

00:06:09

passed #58247
build_android

00:02:34

passed #58243
build_clang_libcpp

00:06:02

passed #58246
build_clazy

00:05:20

passed #58244
build_gcc_49

00:08:52

passed #58245
build_mingw64_fedora

00:03:40