Revert "regcomp.c: Compile inverted character classes with \p{}"smoke-me/khw-revert_invert

This reverts commit b6c46382308166d54090e3d8e385710664693ac0.
That commit and a later bug fix to it

5d103fec94a383c3e6812c3cb735356fffe54e7c

are causing this:
panic: del_backref, svp=0 during global destruction.
t/re/regexp_qr_embed ........... FAILED--non-zero wait status: 5632

1 files changed, 5 insertions, 1 deletions

diff --git a/regcomp.c b/regcomp.c
index 702acd3bb4..7e92da5826 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -10580,6 +10580,7 @@ parseit:
 
                     /* Look up the property name, and get its swash and
                      * inversion list, if the property is found  */
+                    if (! (ANYOF_FLAGS(ret) & ANYOF_INVERT)) {
                     if (swash) {
                         SvREFCNT_dec(swash);
                     }
@@ -10590,7 +10591,10 @@ parseit:
                                                       undefined properties */
                                              NULL, FALSE /* No inversion list */
                                             );
-                    if (   ! swash
+                    }
+
+                    if (   ANYOF_FLAGS(ret) & ANYOF_INVERT
+                        || ! swash
                         || ! SvROK(swash)
                         || ! SvTYPE(SvRV(swash)) == SVt_PVHV
                         || ! (invlistsvp =