Fix comments

lib/cocoapods/installer/file_references_installer.rb

@@ -223,10 +223,6 @@ module Pod
       #         The consumer file accessor for which the headers need to be
       #         linked.
       #
-      # @return [Hash{Pathname => Array<Pathname>}] A hash containing the
-      #         headers folders as the keys and the absolute paths of the
-      #         header files as the values.
-      #
       def vendored_frameworks_header_mappings(headers_sandbox, file_accessor)
         mappings = {}
         file_accessor.vendored_frameworks.each do |framework|

lib/cocoapods/sandbox/file_accessor.rb

@@ -154,7 +154,7 @@ module Pod
 
       # @param  [Pathname] framework
       #         The vendored framework to search into.
-      # @return [Array<Pathname>] The paths of the header directory of the
+      # @return [Pathname] The path of the header directory of the
       #         vendored framework.
       #
       def self.vendored_frameworks_headers_dir(framework)