Remove e2mmap entries from docs

NEWS

@@ -584,6 +584,7 @@ StringScanner::
   * Shell (shell gem)
   * Synchronizer (sync gem)
   * ThreadsWait (thwait gem)
+  * E2MM (e2mmap gem)
 
 Proc::
   * Proc#to_s format was changed. [Feature #16101]

doc/maintainers.rdoc

@@ -162,9 +162,6 @@ Zachary Scott (zzak)
   _unmaintained_
   https://github.com/ruby/delegate
   https://rubygems.org/gems/delegate
-[lib/e2mmap.rb]
-  Keiju ISHITSUKA (keiju)
-  https://rubygems.org/gems/e2mmap
 [lib/fileutils.rb]
   _unmaintained_
   https://github.com/ruby/fileutils

doc/standard_library.rdoc

@@ -62,7 +62,6 @@ Bundler:: Manage your Ruby application's gem dependencies
 CGI:: Support for the Common Gateway Interface protocol
 CSV:: Provides an interface to read and write CSV files and data
 Delegator:: Provides three abilities to delegate method calls to an object
-E2MM:: Module for defining custom exceptions with specific messages
 FileUtils:: Several file utility methods for copying, moving, removing, etc
 Forwardable:: Provides delegation of specified methods to a designated object
 GetoptLong:: Parse command line options similar to the GNU C getopt_long()