Suppress shell warnings when hashing is disabled by `set +h`

libexec/rbenv-sh-rehash

@@ -10,4 +10,4 @@ fi
 # When rbenv shell integration is enabled, delegate to rbenv-rehash,
 # then tell the shell to empty its command lookup cache.
 rbenv-rehash
-echo "hash -r"
+echo "hash -r 2>/dev/null || true"