undeprecate switch and smartmatch

The deprecation warnings don't appear to have had any tests.

pod/perldeprecation.pod

@@ -71,15 +71,6 @@ Category: "deprecated::subsequent_use_version"
 
 =head2 Perl 5.42
 
-=head3 Smartmatch
-
-Smartmatch is now seen as a failed experiment and was marked as deprecated
-in Perl 5.37.10. This includes the C<when> and C<given> keywords, as well
-as the smartmatch operator C<~~>. The feature will be removed entirely in the
-Perl 5.42.0 production release.
-
-Category: "deprecated::smartmatch"
-
 =head3 Goto Block Construct
 
 C<goto LABEL;> will produce a deprecated warning when jumping into the body

pod/perldiag.pod

@@ -2775,12 +2775,6 @@ L<perlfunc/getsockopt>.
 arguments are provided in key/value pairs, with the keys being one
 of C<input>, C<output> or C<detail>, followed by a boolean.
 
-=item given is deprecated
-
-(D deprecated::smartmatch) C<given> depends on smartmatch, which is
-deprecated. It will be removed in Perl 5.42. See the explanation under
-L<perlsyn/Experimental Details on given and when>.
-
 =item Global symbol "%s" requires explicit package name (did you forget to
 declare "my %s"?)
 
@@ -6219,14 +6213,6 @@ so there can't be any left to fill later parameters.
 overload it: Perl refuses to use the object's underlying structure
 for the smart match.
 
-=item Smartmatch is deprecated
-
-(D deprecated::smartmatch) This warning is emitted if you
-use the smartmatch (C<~~>) operator.  This is a deprecated
-feature.  Particularly, its behavior is noticed for being
-unnecessarily complex and unintuitive, and it will be removed
-in Perl 5.42.
-
 =item Sorry, hash keys must be smaller than 2**31 bytes
 
 (F) You tried to create a hash containing a very large key, where "very
@@ -8237,14 +8223,6 @@ but in actual fact, you got
 
 So put in parentheses to say what you really mean.
 
-=item when is deprecated
-
-(D deprecated::smartmatch) C<when> depends on smartmatch, which is
-deprecated.  Additionally, it has several special cases that may
-not be immediately obvious, and it will be removed in Perl 5.42.
-See the explanation
-under L<perlsyn/Experimental Details on given and when>.
-
 =item Wide character in %s
 
 (S utf8) Perl met a wide character (ordinal >255) when it wasn't

regen/warnings.pl

@@ -16,7 +16,7 @@
 #
 # This script is normally invoked from regen.pl.
 
-$VERSION = '1.72';
+$VERSION = '1.73';
 
 BEGIN {
     require './regen/regen_lib.pl';
@@ -80,7 +80,6 @@ BEGIN
                                 'deprecated::dot_in_inc'               => [ 5.025011, DEFAULT_ON],
                                 'deprecated::version_downgrade'        => [ 5.035009, DEFAULT_ON],
                                 'deprecated::delimiter_will_be_paired' => [ 5.035010, DEFAULT_ON],
-                                'deprecated::smartmatch'               => [ 5.037010, DEFAULT_ON],
                                 'deprecated::missing_import_called_with_args'   
                                                                        => [ 5.039002, DEFAULT_ON],
                                 'deprecated::subsequent_use_version'   => [ 5.039008, DEFAULT_ON],
@@ -188,6 +187,7 @@ BEGIN
 # the experiments were successful (or abandonned),
 # so no warning bit is needed anymore
 my %NO_BIT_FOR = map { ( uc $_ => 1, $_ => 1 ) } qw(
+  deprecated::smartmatch
   experimental::lexical_subs
   experimental::postderef
   experimental::signatures

t/lib/feature/smartmatch

@@ -5,7 +5,6 @@ __END__
 my @x = qw(a b c);
 my $y = "b" ~~ @x;
 EXPECT
-Smartmatch is deprecated at - line 2.
 ########
 # NAME explicit disable
 no feature "smartmatch";
@@ -21,15 +20,13 @@ use feature "smartmatch";
 my @x = qw(a b c);
 my $y = "b" ~~ @x;
 EXPECT
-Smartmatch is deprecated at - line 3.
 ########
 # NAME explicit disable then enable
 no feature "smartmatch";
 use feature "smartmatch";
 my @x = qw(a b c);
 my $y = "b" ~~ @x;
 EXPECT
-Smartmatch is deprecated at - line 4.
 ########
 # NAME implicit disable
 use v5.41;
@@ -46,4 +43,3 @@ use feature "smartmatch";
 my @x = qw(a b c);
 my $y = "b" ~~ @x;
 EXPECT
-Smartmatch is deprecated at - line 4.

t/op/smartmatch.t

@@ -8,7 +8,6 @@ BEGIN {
 use strict;
 use warnings;
 no warnings 'uninitialized';
-no warnings 'deprecated';    # smartmatch is deprecated and will be removed in 5.042
 
 ++$|;
 

t/op/switch.t

@@ -8,7 +8,6 @@ BEGIN {
 
 use strict;
 use warnings;
-no warnings 'deprecated';
 
 plan tests => 197;
 

toke.c

@@ -6780,9 +6780,6 @@ yyl_tilde(pTHX_ char *s)
         if (!PL_lex_allbrackets && PL_lex_fakeeof >= LEX_FAKEEOF_COMPARE)
             TOKEN(0);
         s += 2;
-        Perl_ck_warner_d(aTHX_
-            packWARN(WARN_DEPRECATED__SMARTMATCH),
-            "Smartmatch is deprecated");
         NCEop(OP_SMARTMATCH);
     }
     s++;
@@ -8311,8 +8308,6 @@ yyl_word_or_keyword(pTHX_ char *s, STRLEN len, I32 key, I32 orig_keyword, struct
 
     case KEY_given:
         pl_yylval.ival = CopLINE(PL_curcop);
-        Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED__SMARTMATCH),
-                         "given is deprecated");
         OPERATOR(KW_GIVEN);
 
     case KEY_glob:
@@ -8822,9 +8817,6 @@ yyl_word_or_keyword(pTHX_ char *s, STRLEN len, I32 key, I32 orig_keyword, struct
         if (!PL_lex_allbrackets && PL_lex_fakeeof >= LEX_FAKEEOF_NONEXPR)
             return REPORT(0);
         pl_yylval.ival = CopLINE(PL_curcop);
-        Perl_ck_warner_d(aTHX_
-            packWARN(WARN_DEPRECATED__SMARTMATCH),
-            "when is deprecated");
         OPERATOR(KW_WHEN);
 
     case KEY_while: