README.md in fluent-plugin-geoip-0.3.1 vs README.md in fluent-plugin-geoip-0.4.0

@@ -54,11 +54,10 @@
   <record>
     city            ${city["host"]}
     latitude        ${latitude["host"]}
     longitude       ${longitude["host"]}
     country_code3   ${country_code3["host"]}
-    country_code2   ${country_code2["host"]}
     country         ${country_code["host"]}
     country_name    ${country_name["host"]}
     dma             ${dma_code["host"]}
     area            ${area_code["host"]}
     region          ${region["host"]}
@@ -187,10 +186,9 @@
 
 * ${city[lookup_field]}
 * ${latitude[lookup_field]}
 * ${longitude[lookup_field]}
 * ${country_code3[lookup_field]}
-* ${country_code2[lookup_field]}
 * ${country_code[lookup_field]}
 * ${country_name[lookup_field]}
 * ${dma_code[lookup_field]}
 * ${area_code[lookup_field]}
 * ${region[lookup_field]}