Remove 3 unused interpreter variables

These variables have been unused in the Perl core since
commit 4c88d5e0740d796bf5064336d280bba72897f385.

The variables are undocumented.  The only real use of any of these I
found in CPAN is at
https://metacpan.org/source/ABERGMAN/Devel-GC-Helper-0.25/Helper.xs#L1
The uses there appear to be in a list of known Perl variables.  Since
the module was published, more than a few new variables have been added,
making this code obsolete anyway.

1 files changed, 0 insertions, 3 deletions

diff --git a/sv.c b/sv.c
index 37344aeed6..0a4d26fd53 100644
--- a/sv.c
+++ b/sv.c
@@ -13432,15 +13432,12 @@ perl_clone_using(PerlInterpreter *proto_perl, UV flags,
     /* utf8 character class swashes */
     PL_utf8_alnum	= sv_dup_inc(proto_perl->Iutf8_alnum, param);
     PL_utf8_alpha	= sv_dup_inc(proto_perl->Iutf8_alpha, param);
-    PL_utf8_blank	= sv_dup_inc(proto_perl->Iutf8_blank, param);
-    PL_utf8_space	= sv_dup_inc(proto_perl->Iutf8_space, param);
     PL_utf8_graph	= sv_dup_inc(proto_perl->Iutf8_graph, param);
     PL_utf8_digit	= sv_dup_inc(proto_perl->Iutf8_digit, param);
     PL_utf8_upper	= sv_dup_inc(proto_perl->Iutf8_upper, param);
     PL_utf8_lower	= sv_dup_inc(proto_perl->Iutf8_lower, param);
     PL_utf8_print	= sv_dup_inc(proto_perl->Iutf8_print, param);
     PL_utf8_punct	= sv_dup_inc(proto_perl->Iutf8_punct, param);
-    PL_utf8_xdigit	= sv_dup_inc(proto_perl->Iutf8_xdigit, param);
     PL_utf8_mark	= sv_dup_inc(proto_perl->Iutf8_mark, param);
     PL_utf8_X_regular_begin	= sv_dup_inc(proto_perl->Iutf8_X_regular_begin, param);
     PL_utf8_X_extend	= sv_dup_inc(proto_perl->Iutf8_X_extend, param);