regex: Remove FOLDCHAR regnode type

This node type hasn't been used since 5.14.0.  Instead an ANYOFV node
was generated where formerly a FOLDCHAR node would have been used.  The
ANYOFV was used because it already existed and was up-to-date, whereas
FOLDCHAR would have needed some bug fixes to adapt it, even though it
would be faster in execution than ANYOFV; so the code for it was
retained in case it was needed.

However, both these solutions were defective, and a previous commit has
changed things to a different type of solution entirely.  Thus FOLDCHAR
is obsolescent and can be removed, though the code in it was used as a
base for some of the new solutions.

1 files changed, 0 insertions, 21 deletions

diff --git a/regexec.c b/regexec.c
index 54cc0174b1..6bd8b20b60 100644
--- a/regexec.c
+++ b/regexec.c
@@ -5710,27 +5710,6 @@ NULL
             sayNO;
             /* NOTREACHED */
 #undef ST
-        case FOLDCHAR:
-            n = ARG(scan);
-            if ( n == (U32)what_len_TRICKYFOLD(locinput,utf8_target,ln) ) {
-                locinput += ln;
-            } else if ( LATIN_SMALL_LETTER_SHARP_S == n && !utf8_target && !UTF_PATTERN ) {
-                sayNO;
-            } else  {
-                U8 folded[UTF8_MAXBYTES_CASE+1];
-                STRLEN foldlen;
-                const char * const l = locinput;
-                char *e = PL_regeol;
-                to_uni_fold(n, folded, &foldlen);
-
-		if (! foldEQ_utf8((const char*) folded, 0,  foldlen, 1,
-                	       l, &e, 0,  utf8_target)) {
-                        sayNO;
-                }
-                locinput = e;
-            } 
-            nextchr = UCHARAT(locinput);  
-            break;
         case LNBREAK:
             if ((n=is_LNBREAK(locinput,utf8_target))) {
                 locinput += n;