CLEANUP: opentracing: removed unused function flt_ot_var_get()

The flt_ot_var_get() function is not used anywhere and is unnecessary
in the existing implementation of the OpenTracing filter.

This patch must be backported as far as 2.4.

(cherry picked from commit e6f76f06633eb460d6731e4abe709a2c2eed0557)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 532e11bc4881ee876ede5ccff98d990db4632210)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
2 files changed