Don't add "-g" by default.

--- a/configure.ac
+++ b/configure.ac
@@ -95,7 +95,7 @@ AM_CONDITIONAL([WANT_TESTS], [test x"$enable_tests" = xyes])
 AM_CPPFLAGS="-I\$(top_srcdir)/include -DDEFAULTTEXTDIR='\"\$(textlibdir)\"'"
 AC_SUBST(AM_CPPFLAGS)
 
-AM_CFLAGS="-g -Wall -std=gnu99 -D_GNU_SOURCE=1 -Wextra -pedantic -Wsign-compare $COVERAGE_CFLAGS $ASAN_CFLAGS $UBSAN_CFLAGS"
+AM_CFLAGS="-Wall -std=gnu99 -D_GNU_SOURCE=1 -Wextra -pedantic -Wsign-compare $COVERAGE_CFLAGS $ASAN_CFLAGS $UBSAN_CFLAGS"
 AC_SUBST(AM_CFLAGS)
 
 AM_LDFLAGS="$COVERAGE_LDFLAGS $ASAN_LDFLAGS $UBSAN_LDFLAGS"