oeqa/qemurunner: Don't print a warning for harmless exception

Printing a warning for something which is harmless just causes the
people monitoring the autobuilder more work. Silently ignore this race.

(From OE-Core rev: 2246c8d2466d3876fd1b27fd1943aa4bbf28e14e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oeqa/utils/qemurunner.py

@@ -430,7 +430,8 @@ class QemuRunner:
             try:
                 os.remove(self.qemu_pidfile)
             except FileNotFoundError as e:
-                self.logger.warning('qemu pidfile is no longer present')
+                # We raced, ignore
+                pass
         if self.monitorpipe:
             self.monitorpipe.close()