Merge pull request rails#51856 from yahonda/restore_warning_condition_for_ruby34

Restore unused block warnings condition for Ruby 3.4

Author: yahonda

activesupport/lib/active_support/testing/strict_warnings.rb

@@ -14,10 +14,6 @@ class WarningError < StandardError; end
       # Expected non-verbose warning emitted by Rails.
       /Ignoring .*\.yml because it has expired/,
       /Failed to validate the schema cache because/,
-
-      # Ref: https://bugs.ruby-lang.org/issues/15554
-      # This new Ruby 3.4 warning is still being fined tuned to reduce false positives
-      /the block passed to/,
     )
 
     SUPPRESSED_WARNINGS = Regexp.union(