Remove explicit "aliased as" documentation

Most of these are redundant because rdoc handles these itself, but
`titlecase` on `ActiveSupport::Inflector` does not exist so that one is
just incorrect.

actionpack/lib/abstract_controller/translation.rb

@@ -6,7 +6,7 @@ module AbstractController
   module Translation
     mattr_accessor :raise_on_missing_translations, default: false
 
-    # Delegates to <tt>I18n.translate</tt>. Also aliased as <tt>t</tt>.
+    # Delegates to <tt>I18n.translate</tt>.
     #
     # When the given key starts with a period, it will be scoped by the current
     # controller and action. So if you call <tt>translate(".foo")</tt> from
@@ -29,7 +29,7 @@ module AbstractController
     end
     alias :t :translate
 
-    # Delegates to <tt>I18n.localize</tt>. Also aliased as <tt>l</tt>.
+    # Delegates to <tt>I18n.localize</tt>.
     def localize(object, **options)
       I18n.localize(object, **options)
     end

activesupport/lib/active_support/core_ext/object/to_query.rb

@@ -72,8 +72,6 @@ class Hash
   #
   # The string pairs "key=value" that conform the query string
   # are sorted lexicographically in ascending order.
-  #
-  # This method is also aliased as +to_param+.
   def to_query(namespace = nil)
     query = filter_map do |key, value|
       unless (value.is_a?(Hash) || value.is_a?(Array)) && value.empty?

activesupport/lib/active_support/core_ext/string/inflections.rb

@@ -97,8 +97,6 @@ class String
   #   'active_record/errors'.camelize         # => "ActiveRecord::Errors"
   #   'active_record/errors'.camelize(:lower) # => "activeRecord::Errors"
   #
-  # +camelize+ is also aliased as +camelcase+.
-  #
   # See ActiveSupport::Inflector.camelize.
   def camelize(first_letter = :upper)
     case first_letter
@@ -124,8 +122,6 @@ class String
   #   'x-men: the last stand'.titleize                        # => "X Men: The Last Stand"
   #   'string_ending_with_id'.titleize(keep_id_suffix: true)  # => "String Ending With Id"
   #
-  # +titleize+ is also aliased as +titlecase+.
-  #
   # See ActiveSupport::Inflector.titleize.
   def titleize(keep_id_suffix: false)
     ActiveSupport::Inflector.titleize(self, keep_id_suffix: keep_id_suffix)

activesupport/lib/active_support/inflector/methods.rb

@@ -184,8 +184,6 @@ module ActiveSupport
     # optional parameter +keep_id_suffix+ to true.
     # By default, this parameter is false.
     #
-    # +titleize+ is also aliased as +titlecase+.
-    #
     #   titleize('man from the boondocks')                       # => "Man From The Boondocks"
     #   titleize('x-men: the last stand')                        # => "X Men: The Last Stand"
     #   titleize('TheManWithoutAPast')                           # => "The Man Without A Past"