[clean] Remove useless IFS save

bin/blackbox_postdeploy

@@ -26,8 +26,6 @@ fi
 change_to_vcs_root
 prepare_keychain
 
-OLDIFS=$IFS
-
 # Decrypt:
 echo '========== Decrypting new/changed files: START'
 while IFS= read <&99 -r unencrypted_file; do
@@ -39,6 +37,4 @@ while IFS= read <&99 -r unencrypted_file; do
   fi
 done 99<"$BB_FILES"
 
-IFS=$OLDIFS
-
 echo '========== Decrypting new/changed files: DONE'