luacheckrc: Remove accidentally commented directive Accidentally commented in 4b258329e6e4 This directive was removed from Prosody in d59be9befad7 followed by a big sweep of the resulting warnings.

author: Kim Alvefur <zash@zash.se>
date: Tue, 28 Jan 2020 21:54:04 +0100
parent: 3794:4b258329e6e4
child: 4756:098e3b3aac9c
--- a/.luacheckrc	Sat Nov 06 21:09:21 2021 +0100
+++ b/.luacheckrc	Tue Jan 28 21:54:04 2020 +0100
@@ -1,6 +1,5 @@
 cache = true
 allow_defined_top = true
---unused_secondaries = false
 max_line_length = 150
 codes = true
 ignore = { "411/err", "421/err", "411/ok", "421/ok", "211/_ENV" };