Remove a couple of remaining deprecations

Changelog.md

@@ -13,6 +13,8 @@ Breaking Changes:
 * Remove support for present-tense dynamic predicate. (Phil Pirozhkov, #1286)
 * Prevent implicit blocks (e.g blocks as values) from being used with block matchers.
   (Phil Pirozhkov, #1285)
+* Remove deprecated `match_regex` matcher. (Phil Pirozhkov, #1288)
+* Remove deprecated `StartAndEndWith` matcher base class. (Phil Pirozhkov, #1288)
 
 Enhancements:
 

lib/rspec/matchers.rb

@@ -687,15 +687,9 @@ def all(expected)
     #       :c => { :d => (a_value < 3) }
     #     }
     #   )
-    #
-    # @note The `match_regex` alias is deprecated and is not recommended for use.
-    #       It was added in 2.12.1 to facilitate its use from within custom
-    #       matchers (due to how the custom matcher DSL was evaluated in 2.x,
-    #       `match` could not be used there), but is no longer needed in 3.x.
     def match(expected)
       BuiltIn::Match.new(expected)
     end
-    alias_matcher :match_regex, :match
     alias_matcher :an_object_matching, :match
     alias_matcher :a_string_matching, :match
     alias_matcher :matching, :match

lib/rspec/matchers/built_in/start_or_end_with.rb

@@ -54,12 +54,6 @@ def subsets_comparable?
         end
       end
 
-      # For RSpec 3.1, the base class was named `StartAndEndWith`. For SemVer reasons,
-      # we still provide this constant until 4.0.
-      # @deprecated Use StartOrEndWith instead.
-      # @private
-      StartAndEndWith = StartOrEndWith
-
       # @api private
       # Provides the implementation for `start_with`.
       # Not intended to be instantiated directly.

spec/rspec/matchers/aliases_spec.rb

@@ -276,14 +276,6 @@ module RSpec
       ).with_description('an object matching /foo/')
     end
 
-    specify do
-      expect(
-        match_regex(/foo/)
-      ).to be_aliased_to(
-        match(/foo/)
-      ).with_description('match regex /foo/')
-    end
-
     specify do
       expect(
         matching(/foo/)