From c4cce82fa0d061768484f4d2854d30235806b7b4 Mon Sep 17 00:00:00 2001
From: Daniel Kahn Gillmor <dkg@fifthhorseman.net>
Date: Thu, 31 Dec 2020 18:00:37 -0500
Subject: [PATCH] docs: drop deprecated doxygen TCL_SUBST flag

notmuch has no tcl code, and doxygen upstream is deprecating/removing
tcl support anyway:
https://github.com/doxygen/doxygen/commit/48a7afc0caf69857a42b0fe1963db3440cb4000f
---
 doc/doxygen.cfg | 1 -
 1 file changed, 1 deletion(-)

diff --git a/doc/doxygen.cfg b/doc/doxygen.cfg
index a2c4fd07..4a022de1 100644
--- a/doc/doxygen.cfg
+++ b/doc/doxygen.cfg
@@ -27,7 +27,6 @@ INHERIT_DOCS           = YES
 SEPARATE_MEMBER_PAGES  = NO
 TAB_SIZE               = 8
 ALIASES                =
-TCL_SUBST              =
 OPTIMIZE_OUTPUT_FOR_C  = YES
 OPTIMIZE_OUTPUT_JAVA   = NO
 OPTIMIZE_FOR_FORTRAN   = NO