[mirotalksfu] - update readme

public/js/Room.js

@@ -1561,12 +1561,6 @@ function setTheme(theme) {
             document.documentElement.style.setProperty('--msger-bg', 'radial-gradient(#666, #333)');
             document.documentElement.style.setProperty('--wb-bg', 'radial-gradient(#797979, #000)');
             break;
-        case 'green':
-            swalBackground = 'radial-gradient(#393, #000)';
-            document.documentElement.style.setProperty('--body-bg', 'radial-gradient(#393, #000)');
-            document.documentElement.style.setProperty('--msger-bg', 'radial-gradient(#393, #000)');
-            document.documentElement.style.setProperty('--wb-bg', 'radial-gradient(#393, #000)');
-            break;
         //...
     }
 }