Assertion is enough to test that error doesn't happen

If the code to prevent this is removed then an exception will be raised
which will fail the test.

spec/httparty/net_digest_auth_spec.rb

@@ -154,17 +154,11 @@ RSpec.describe Net::HTTPHeader::DigestAuthenticator do
 
   context "with http basic auth response when net digest auth expected" do
     it "should not fail" do
-      # fails already so it is defined here
-      begin
       @digest = setup_digest({
                                'www-authenticate' => 'WWW-Authenticate: Basic realm="testrealm.com""'
                            })
 
       expect(authorization_header).to include("Digest")
-      rescue => e
-        fail "Should not fail on different authentification method"
-      end
-
     end
   end