[aws] Simplify conditional in iam_cert module (ansible#41691)

lib/ansible/modules/cloud/amazon/iam_cert.py

@@ -155,7 +155,7 @@ def dup_check(module, iam, name, new_name, cert, orig_cert_names, orig_cert_bodi
                     elif slug_cert.startswith(slug_orig_cert_bodies):
                         update = True
                         break
-                    elif slug_orig_cert_bodies != slug_cert:
+                    else:
                         module.fail_json(changed=False, msg='A cert with the name %s already exists and'
                                          ' has a different certificate body associated'
                                          ' with it. Certificates cannot have the same name' % orig_cert_names[c_index])