Remove a flaky and unnecessary check

The order in which the libraries appear is not always stable and even
if it were, this test is not the right place to check for this.

lldb/test/API/functionalities/data-formatter/data-formatter-stl/libcxx/initializerlist/TestInitializerList.py

@@ -40,5 +40,3 @@ def test(self):
             "frame variable ils",
             substrs=['[4] = "surprise it is a long string!! yay!!"'],
         )
-
-        self.expect("image list", substrs=self.getLibcPlusPlusLibs())