Remove unused RFC gem

* the RFC gem doesn't support ruby 3.3, but we don't seem to use it anyway

Gemfile

@@ -32,7 +32,6 @@ gem 'public_suffix'
 gem 'puma'
 gem 'rake'
 gem 'redis'
-gem 'rfc822'
 gem 'rubyzip', '>= 1.3.0'
 gem 'sequel', '~> 5.85'
 gem 'sequel_pg', require: 'sequel'

Gemfile.lock

@@ -435,7 +435,6 @@ GEM
     reverse_markdown (2.1.1)
       nokogiri
     rexml (3.3.9)
-    rfc822 (0.1.5)
     roodi (5.0.0)
       ruby_parser (~> 3.2, >= 3.2.2)
     rspec (3.13.0)
@@ -651,7 +650,6 @@ DEPENDENCIES
   railties (~> 7.2.1)
   rake
   redis
-  rfc822
   roodi
   rspec (~> 3.13.0)
   rspec-collection_matchers

lib/sequel_plugins/vcap_validations.rb

@@ -8,12 +8,5 @@ def validates_url(attr, opts={})
 
       validates_format(URI::DEFAULT_PARSER.make_regexp(%w[http https]), attr, message: opts.fetch(:message, :url))
     end
-
-    # Validates that an attribute is a valid email address
-    #
-    # @param [Symbol] The attribute to validate
-    def validates_email(attr)
-      validates_format(RFC822::EMAIL_REGEXP_WHOLE, attr, message: :email) if send(attr)
-    end
   end
 end

spec/unit/lib/sequel_plugins/vcap_validations_spec.rb

@@ -63,45 +63,4 @@ def self.define_validations(&)
       end
     end
   end
-
-  describe 'validates_email' do
-    before do
-      @c.define_validations { validates_email(:val) }
-    end
-
-    it 'allows a valid email' do
-      @m.val = '[email protected]'
-      expect(@m).to be_valid
-    end
-
-    it 'does not allow an email with no domain' do
-      @m.val = 'some_guy'
-      expect(@m).not_to be_valid
-    end
-
-    it 'does not allow an email with no user' do
-      @m.val = '@somedomain.com'
-      expect(@m).not_to be_valid
-    end
-
-    it 'does not allow a malformed email with multiple @' do
-      @m.val = 'foo@[email protected]'
-      expect(@m).not_to be_valid
-    end
-
-    it 'allows a nil email' do
-      @m.val = nil
-      expect(@m).to be_valid
-    end
-
-    it 'does not allow an empty email' do
-      @m.val = ''
-      expect(@m).not_to be_valid
-    end
-
-    it 'does not allow an email with only spaces' do
-      @m.val = ' '
-      expect(@m).not_to be_valid
-    end
-  end
 end