diff --git a/m4/tcl.m4 b/m4/tcl.m4
index 1a033f64e..8c0f234dc 100644
--- a/m4/tcl.m4
+++ b/m4/tcl.m4
@@ -51,10 +51,6 @@
 
 AC_PREREQ([2.71])
 
-dnl TEA extensions pass us the version of TEA they think they
-dnl are compatible with (must be set in TEA_INIT below)
-dnl TEA_VERSION="4.0"
-
 # Possible values for key variables defined:
 #
 # TEA_WINDOWINGSYSTEM - win32 aqua x11 (mirrors 'tk windowingsystem')