Don't report allocation failure via logging

They will be reported by allocchk and will abort the program. There is
no point to log them.

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>

src/config.c

@@ -91,10 +91,6 @@ parse_matrix(session_t *ps, const char *src, const char **endptr) {
 
   // Allocate memory
   auto matrix = ccalloc(wid * hei + 2, xcb_render_fixed_t);
-  if (!matrix) {
-    printf_errf("(): Failed to allocate memory for matrix.");
-    goto err1;
-  }
 
   // Read elements
   {