better test

Signed-off-by: Rauf, Rana <[email protected]>

Author: raaiq1

sycl/test/basic_tests/no_iostream.cpp

@@ -1,9 +1,6 @@
 // RUN: %clangxx -fsycl %s -S -emit-llvm -o- | FileCheck %s
-// CHECK-NOT: @_ZStL8__ioinit = internal global %"class.std::ios_base::Init"
+// CHECK-NOT: {{^@}}
 //
 // Tests if <sycl/sycl.hpp> headers include any <iostream> headers
 
 #include <sycl/sycl.hpp>
-using namespace sycl;
-
-int main() { return 0; }