Fix Permissions-Policy header listed twice in output

run_security_headers() listed "Permissions-Policy" twice in its
header_and_svrty checklist: once as OK (since 2020) and again as INFO
(accidentally added in 12036fb). The loop matched the same header on
both iterations, emitting two entries to JSON (headerResponse) and the
terminal output. Remove the duplicate INFO entry, keeping the intended
OK classification.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

testssl.sh

@@ -3604,7 +3604,6 @@ run_security_headers() {
                              "X-XSS-Protection INFO" \
                              "Access-Control-Allow-Origin INFO" \
                              "Access-Control-Allow-Credentials INFO" \
-                             "Permissions-Policy INFO" \
                              "Upgrade INFO" \
                              "X-Served-By INFO" \
                              "Referrer-Policy INFO" \