Remove reference to Trusted Computing Group license

The files tpmb.h and implementation.h had the TCGL header applied
in the 1.0 release, however, this header was then removed in the
1.1.0 release in favour of the standard BSD license:

  d0c853f900

Since that time further refactoring means these files no longer
even exist.

IOW, the comment against the license tag refers to a problem that
stopped existing long ago, which is good since TCGL is not permitted
in Fedora anymore without an exception.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>

tpm2-tss.spec

@@ -8,8 +8,6 @@ Version:       4.1.3
 Release:       9%{?candidate:.%{candidate}}%{?dist}
 Summary:       TPM2.0 Software Stack
 
-# The entire source code is under BSD except implementation.h and tpmb.h which
-# is under TCGL(Trusted Computing Group License).
 License:       BSD-2-Clause
 URL:           https://github.com/tpm2-software/tpm2-tss
 Source0:       %{url}/releases/download/%{version}/%{name}-%{version}%{?candidate:-%{candidate}}.tar.gz