Remove more macOS 14 case from shared extensions switch

Yeah. Copied by tab.

Author: crazywhalecc

src/globals/test-extensions.php

@@ -155,7 +155,6 @@ function quote2(string $param): string
     switch ($argv[2] ?? null) {
         case 'ubuntu-22.04':
         case 'ubuntu-22.04-arm':
-        case 'macos-14':
         case 'macos-15':
         case 'macos-15-intel':
             $shared_cmd = ' --build-shared=' . quote2($shared_extensions) . ' ';