src: zap unused file

src/etc/ca_countries

-AX Aland Islands
-AD Andorra
-AE United Arab Emirates
-AF Afghanistan
-AG Antigua and Barbuda
-AI Anguilla
-AL Albania
-AM Armenia
-AN Netherlands Antilles
-AO Angola
-AQ Antarctica
-AR Argentina
-AS American Samoa
-AT Austria
-AU Australia
-AW Aruba
-AZ Azerbaijan
-BA Bosnia and Herzegovina
-BB Barbados
-BD Bangladesh
-BE Belgium
-BF Burkina Faso
-BG Bulgaria
-BH Bahrain
-BI Burundi
-BJ Benin
-BM Bermuda
-BN Brunei Darussalam
-BO Bolivia
-BR Brazil
-BS Bahamas
-BT Bhutan
-BV Bouvet Island
-BW Botswana
-BZ Belize
-CA Canada
-CC Cocos (Keeling) Islands
-CF Central African Republic
-CH Switzerland
-CI Cote D'Ivoire (Ivory Coast)
-CK Cook Islands
-CL Chile
-CM Cameroon
-CN China
-CO Colombia
-CR Costa Rica
-CS Czechoslovakia (former)
-CV Cape Verde
-CX Christmas Island
-CY Cyprus
-CZ Czech Republic
-DE Germany
-DJ Djibouti
-DK Denmark
-DM Dominica
-DO Dominican Republic
-DZ Algeria
-EC Ecuador
-EE Estonia
-EG Egypt
-EH Western Sahara
-ER Eritrea
-ES Spain
-ET Ethiopia
-FI Finland
-FJ Fiji
-FK Falkland Islands (Malvinas)
-FM Micronesia
-FO Faroe Islands
-FR France
-FX France, Metropolitan
-GA Gabon
-GB Great Britain (UK)
-GD Grenada
-GE Georgia
-GF French Guiana
-GG Guernsey
-GH Ghana
-GI Gibraltar
-GL Greenland
-GM Gambia
-GN Guinea
-GP Guadeloupe
-GQ Equatorial Guinea
-GR Greece
-GS S. Georgia and S. Sandwich Isls.
-GT Guatemala
-GU Guam
-GW Guinea-Bissau
-GY Guyana
-HK Hong Kong
-HM Heard and McDonald Islands
-HN Honduras
-HR Croatia (Hrvatska)
-HT Haiti
-HU Hungary
-ID Indonesia
-IE Ireland
-IL Israel
-IM Isle of Man
-IN India
-IO British Indian Ocean Territory
-IS Iceland
-IT Italy
-JE Jersey
-JM Jamaica
-JO Jordan
-JP Japan
-KE Kenya
-KG Kyrgyzstan
-KH Cambodia
-KI Kiribati
-KM Comoros
-KN Saint Kitts and Nevis
-KR Korea (South)
-KW Kuwait
-KY Cayman Islands
-KZ Kazakhstan
-LA Laos
-LC Saint Lucia
-LI Liechtenstein
-LK Sri Lanka
-LS Lesotho
-LT Lithuania
-LU Luxembourg
-LV Latvia
-LY Libya
-MA Morocco
-MC Monaco
-MD Moldova
-ME Montenegro
-MG Madagascar
-MH Marshall Islands
-MK Macedonia
-ML Mali
-MM Myanmar
-MN Mongolia
-MO Macau
-MP Northern Mariana Islands
-MQ Martinique
-MR Mauritania
-MS Montserrat
-MT Malta
-MU Mauritius
-MV Maldives
-MW Malawi
-MX Mexico
-MY Malaysia
-MZ Mozambique
-NA Namibia
-NC New Caledonia
-NE Niger
-NF Norfolk Island
-NG Nigeria
-NI Nicaragua
-NL Netherlands
-NO Norway
-NP Nepal
-NR Nauru
-NT Neutral Zone
-NU Niue
-NZ New Zealand (Aotearoa)
-OM Oman
-PA Panama
-PE Peru
-PF French Polynesia
-PG Papua New Guinea
-PH Philippines
-PK Pakistan
-PL Poland
-PM St. Pierre and Miquelon
-PN Pitcairn
-PR Puerto Rico
-PS Palestinian Territory
-PT Portugal
-PW Palau
-PY Paraguay
-QA Qatar
-RE Reunion
-RO Romania
-RS Serbia
-RU Russian Federation
-RW Rwanda
-SA Saudi Arabia
-SB Solomon Islands
-SC Seychelles
-SE Sweden
-SG Singapore
-SH St. Helena
-SI Slovenia
-SJ Svalbard and Jan Mayen Islands
-SK Slovak Republic
-SL Sierra Leone
-SM San Marino
-SN Senegal
-SR Suriname
-ST Sao Tome and Principe
-SU USSR (former)
-SV El Salvador
-SZ Swaziland
-TC Turks and Caicos Islands
-TD Chad
-TF French Southern Territories
-TG Togo
-TH Thailand
-TJ Tajikistan
-TK Tokelau
-TM Turkmenistan
-TN Tunisia
-TO Tonga
-TP East Timor
-TR Turkey
-TT Trinidad and Tobago
-TV Tuvalu
-TW Taiwan
-TZ Tanzania
-UA Ukraine
-UG Uganda
-UM US Minor Outlying Islands
-US United States
-UY Uruguay
-UZ Uzbekistan
-VA Vatican City State (Holy See)
-VC Saint Vincent and the Grenadines
-VE Venezuela
-VG Virgin Islands (British)
-VI Virgin Islands (U.S.)
-VN Viet Nam
-VU Vanuatu
-WF Wallis and Futuna Islands
-WS Samoa
-YE Yemen
-YT Mayotte
-ZA South Africa
-ZM Zambia