Remove snowplow spec helper fix

Ruby 2.6.x wasn't able to resolve **kwargs correctly and always added an
empty Hash, although there was non given.

This behaviour changed with Ruby 2.7.x and we can therefore remove the
fix again.

spec/support/helpers/snowplow_helpers.rb

@@ -32,16 +32,8 @@ module SnowplowHelpers
   #     end
   #   end
   def expect_snowplow_event(category:, action:, **kwargs)
-    # This check will no longer be needed with Ruby 2.7 which
-    # would not pass any arguments when using **kwargs.
-    # https://gitlab.com/gitlab-org/gitlab/-/issues/263430
-    if kwargs.present?
-      expect(Gitlab::Tracking).to have_received(:event) # rubocop:disable RSpec/ExpectGitlabTracking
-        .with(category, action, **kwargs).at_least(:once)
-    else
-      expect(Gitlab::Tracking).to have_received(:event) # rubocop:disable RSpec/ExpectGitlabTracking
-        .with(category, action).at_least(:once)
-    end
+    expect(Gitlab::Tracking).to have_received(:event) # rubocop:disable RSpec/ExpectGitlabTracking
+      .with(category, action, **kwargs).at_least(:once)
   end
 
   # Asserts that no call to `Gitlab::Tracking#event` was made.