rm digest_auth tests since rack 3.1 removes support

spec/integration/support/application.rb

@@ -63,22 +63,6 @@ def self.respond_with(options = {})
       }
     end
 
-    map "/digest_auth" do
-      unprotected_app = lambda { |env|
-        IntegrationServer.respond_with :body => "digest-auth"
-      }
-
-      realm = 'digest-realm'
-      app = Rack::Auth::Digest::MD5.new(unprotected_app) do |username|
-        username == 'admin' ? Digest::MD5.hexdigest("admin:#{realm}:secret") : nil
-      end
-      app.realm = realm
-      app.opaque = 'this-should-be-secret'
-      app.passwords_hashed = true
-
-      run app
-    end
-
     map "/multipart" do
       run lambda { |env|
         boundary = 'mimepart_boundary'

spec/savon/options_spec.rb

@@ -568,15 +568,6 @@ def to_s
     end
   end
 
-  context "global :digest_auth" do
-    it "sets the digest auth credentials" do
-      client = new_client(:endpoint => @server.url(:digest_auth), :digest_auth => ["admin", "secret"])
-      response = client.call(:authenticate)
-
-      expect(response.http.body).to eq("digest-auth")
-    end
-  end
-
   context "global :ntlm" do
     it "sets the ntlm credentials to use" do
       credentials = ["admin", "secret"]