Remove another obsolete extractor script

This is all covered by the generic boarding pass extractor now.

src/lib/scripts/americanairlines.js

-/*
-   SPDX-FileCopyrightText: 2018 Volker Krause <vkrause@kde.org>
-
-   SPDX-License-Identifier: LGPL-2.0-or-later
-*/
-
-function main(pdf, node) {
-    var res = [];
-    for (barcode of node.findChildNodes({ scope: "Descendants", mimeType: "internal/iata-bcbp" })) {
-        if (barcode.location == undefined)
-            continue;
-        res.push(parsePage(pdf.pages[barcode.location], barcode));
-    }
-    return res;
-}
-
-function parsePage(page, node)
-{
-    var res = node.result[0];
-    var time = page.text.match(/Departing at\s+(\d{1,2}:\d{2}[AP]M)/);
-    if (time)
-        res.reservationFor.departureTime = JsonLd.toDateTime(time[1], "h:mmA", "en")
-    time = page.text.match(/Arriving at:\s+(\d{1,2}:\d{2}[AP]M)/);
-    if (time)
-        res.reservationFor.arrivalTime = JsonLd.toDateTime(time[1], "h:mmA", "en")
-    return res;
-}

src/lib/scripts/americanairlines.json

-{
-    "mimeType": "application/pdf",
-    "filter": [
-        { "field": "From", "match": "americanairlines@aa.com", "mimeType": "message/rfc822", "scope": "Ancestors" },
-        { "field": "operatingCarrierDesignator", "match": "AA", "mimeType": "internal/iata-bcbp", "scope": "Descendants" }
-    ],
-    "script": "americanairlines.js"
-}

src/lib/scripts/extractors.qrc

@@ -18,8 +18,6 @@
         <file>airdo.js</file>
         <file>amadeus.json</file>
         <file>amadeus.js</file>
-        <file>americanairlines.json</file>
-        <file>americanairlines.js</file>
         <file>aohostels.json</file>
         <file>aohostels.js</file>
         <file>availpro.json</file>