chore: remove server superglobal support (#616)

Author: bshaffer

src/CredentialsLoader.php

@@ -295,6 +295,6 @@ public function getUniverseDomain(): string
 
     private static function getEnv(string $env): mixed
     {
-        return getenv($env) ?: $_SERVER[$env] ?? $_ENV[$env] ?? null;
+        return getenv($env) ?: $_ENV[$env] ?? null;
     }
 }

tests/CredentialsLoaderTest.php

@@ -168,19 +168,6 @@ public function testLoadJsonFromGetEnv(): void
         $this->assertEquals('getenv', $json['type']);
     }
 
-    /**
-     * @runInSeparateProcess
-     */
-    public function testLoadJsonFromServer(): void
-    {
-        $_SERVER[CredentialsLoader::ENV_VAR] = __DIR__ . '/fixtures7/server.json';
-
-        $json = CredentialsLoader::fromEnv();
-
-        $this->assertArrayHasKey('type', $json);
-        $this->assertEquals('server', $json['type']);
-    }
-
     /**
      * @runInSeparateProcess
      */
@@ -199,7 +186,7 @@ public function testLoadJsonFromEnv(): void
      */
     public function testLoadJsonFromGetEnvBackwardsCompatibility(): void
     {
-        $_SERVER[CredentialsLoader::ENV_VAR] = __DIR__ . '/fixtures7/server.json';
+        $_ENV[CredentialsLoader::ENV_VAR] = __DIR__ . '/fixtures7/env.json';
         putenv(CredentialsLoader::ENV_VAR . '=' . __DIR__ . '/fixtures7/getenv.json');
 
         $json = CredentialsLoader::fromEnv();