Do not change the entire codebase style only because of active_storage

We are already removing the braces around hash parameters in the last
argument in other places so we should not change the entire codebase
because of two places.

.rubocop.yml

@@ -16,7 +16,6 @@ Style/AndOr:
 # method call.
 Style/BracesAroundHashParameters:
   Enabled: true
-  EnforcedStyle: context_dependent
 
 # Align `when` with `case`.
 Layout/CaseIndentation:

activestorage/lib/active_storage/service/disk_service.rb

@@ -81,10 +81,8 @@ class ActiveStorage::Service::DiskService < ActiveStorage::Service
           content_length: content_length,
           checksum: checksum
         },
-        {
-          expires_in: expires_in,
-          purpose: :blob_token
-        }
+        expires_in: expires_in,
+        purpose: :blob_token
       )
 
       generated_url =