Don't check noargs in remotetimeout.exp

Don't check noargs in remotetimeout.exp

The condition [target_info exists noargs] is checked when
remotetimeout.exp was added
https://sourceware.org/ml/gdb-patches/2005-02/msg00052.html

noargs means GDB does not support argument passing for inferior,
rather than doesn't support argument passing to GDB.  remotetimeout.exp
passes -l to GDB only, doesn't pass any arguments to the inferior.

This patch is to remove such unnecessary checking, and
remotetimeout.exp then can be run with native-gdbserver board file.

gdb/testsuite:

2014-10-16  Yao Qi  <yao@codesourcery.com>

	* gdb.base/remotetimeout.exp: Remove noargs checking.