[binutils-gdb] btrace, test: remove buffer-size test with unlimited buffer size

[sergiodj+buildbot at redhat dot com]

*** TEST RESULTS FOR COMMIT 157280a4d6b8c49703c698bda5546d7b2cc21e35 ***

Author: Markus Metzger <markus.t.metzger@intel.com>
Branch: master
Commit: 157280a4d6b8c49703c698bda5546d7b2cc21e35

btrace, test: remove buffer-size test with unlimited buffer size

The gdb.btrace/buffer-size.exp test starts recording with an unlimited
buffer size.  This will, for a short time, use up most if not all BTS
resources.

I don' think this test is necessary.  Remove it.

testsuite/
	* gdb.btrace/buffer-size.exp: Remove recording with unlimited BTS
	buffer size test.