modif: drop deprecated 'shell' option references (#5894)

The `shell` option has been removed. Remove stale references.

This does NOT remove `shell none`-related code comments in:

- src/firejail/fs_lib.c (L433-L441)
- src/firejail/join.c (L415-L417)

Relates to #5196.

Suggested by #5891.

1 files changed, 0 insertions, 4 deletions

diff --git a/test/utils/build.exp b/test/utils/build.exp
index 3f42a74be..e1ea6af69 100755
--- a/test/utils/build.exp
+++ b/test/utils/build.exp
@@ -57,10 +57,6 @@ expect {
 }
 expect {
         timeout {puts "TESTING ERROR 11\n";exit}
-        "shell none"
-}
-expect {
-        timeout {puts "TESTING ERROR 11\n";exit}
         "private-bin cat,"
 }
 expect {