Removed FFI support (#45)

* Removed FFI support

* run_tests and ci-test.sh should never have differed. Fixing now

* run_tests can now update composer

tests/common.inc

@@ -31,10 +31,4 @@ abstract class CrtTestCase extends PHPUnit_Framework_TestCase {
             $this->setExpectedException($arguments[0]);
         }
     }
-
-    public function skipFFI() {
-        if (CRT::isFFI()) {
-            $this->markTestSkipped();
-        }
-    }
 }