dlang/dub: Don't try to remove tests that aren't run

See dlang/dub#3064 (comment)

1. It does nothing
2. It causes the run to fail when the tests are renamed/removed

Signed-off-by: Andrei Horodniceanu <a.horodniceanu@proton.me>

Author: the-horo

buildkite/build_project.sh

@@ -178,8 +178,6 @@ case "$REPO_FULL_NAME" in
         ;;
 
     dlang/dub)
-        rm test/issue895-local-configuration.sh # FIXME
-        rm test/issue884-init-defer-file-creation.sh # FIXME
         use_travis_test_script
         ;;