libtracefs: Remove dummy tep_vwarning() from unit tests

As the trace libraries have log levels, there is no need to implement a
dummy log function in order to silence the libraries logs.

Link: https://lore.kernel.org/linux-trace-devel/20210507095154.1080202-4-tz.stoyanov@gmail.com

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
1 file changed