chore(readme): remove residual PMPL-1.0 licence badge (owner-authorized)

The README carried a leftover RSR-template badge declaring
"license-PMPL--1.0--or--later", contradicting the repo's actual MPL-2.0
licence (asserted by the SPDX header, the MPL-2.0 badge, and the License
section) and violating the estate rule that PMPL appears only in
palimpsest-license / palimpsest-plasma / consent-aware-http. Owner
explicitly authorized removing this badge this occasion. No LICENSE file
or SPDX-License-Identifier is changed; only the incorrect badge markup is
deleted (the correct MPL-2.0 badge already exists).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: hyperpolymath

README.adoc

@@ -17,7 +17,6 @@ This repository contains:
 (2) a working BEAM + WASM implementation,
 (3) integration tests and benchmarking,
 (4) formal verification artifacts.
-image:https://img.shields.io/badge/license-PMPL--1.0--or--later-blue[License]
 
 == Overview