breaking(cli): remove PJ_QUIET suppression for empty task list

dot_local/bin/executable_pj

@@ -14,8 +14,6 @@
 # Usage: pj [extra args…]   extra args are forwarded to the picked task
 #
 # Env:
-#   PJ_QUIET=1   suppress the "no task sources" error — the down-arrow
-#                bindings use this, where an empty tree is the normal case.
 #   PJ_STATE=FILE  key bindings pass a path; pj writes `open` to it when the
 #                  picker opens and `pj --run` writes `ran`, so the binding
 #                  can tell "no tasks" / "cancelled" / "task printed output"
@@ -392,7 +390,7 @@ while :; do
 done
 
 if [ ${#recs[@]} -eq 0 ]; then
-    [ -n "${PJ_QUIET-}" ] || echo "pj: no task sources found in this tree" >&2
+    echo "pj: no task sources found in this tree" >&2
     exit 1
 fi