MINOR: log: Remove unused case statement during the log-format string parsing

Since the commit cd0d2ed6e ("MEDIUM: log-format: make the LF parser aware of
sample expressions' end"), the LF_STEXPR label in the last switch-case statement
at the end of the for loop in the parse_logformat_string() function cannot be
reached anymore.

This patch should fix the issue #723.
1 file changed