Removes redundant nil? check.

Author: towanda

lib/grape/dsl/configuration.rb

@@ -97,7 +97,7 @@ def unset_description_field(field)
 
       # Merge multiple layers of settings into one hash.
       def stacked_hash_to_hash(settings)
-        return nil if settings.nil? || settings.blank?
+        return nil if settings.blank?
         settings.each_with_object({}) { |value, result| result.deep_merge!(value) }
       end
 

lib/grape/util/content_types.rb

@@ -10,7 +10,7 @@ module ContentTypes
     }
 
     def self.content_types_for_settings(settings)
-      return nil if settings.nil? || settings.blank?
+      return nil if settings.blank?
 
       settings.each_with_object({}) { |value, result| result.merge!(value) }
     end