remove unused ct_fleechance (misteltoe relic)

s/cppcheck

@@ -0,0 +1,3 @@
+#!/bin/sh
+cppcheck -U_MSC_VER --enable=all -IcJSON -Isrc -Iclibs -Istorage src
+

src/kernel/save.c

@@ -1014,7 +1014,7 @@ faction *read_faction(gamedata * data)
     READ_STR(data->store, name, sizeof(name));
     if (check_email(name) == 0) {
       faction_setemail(f, name);
-    } else {
+    } else if (name[0]) {
       log_warning("Invalid email address for faction %s: %s", itoa36(f->no), name);
       faction_setemail(f, NULL);
     }

src/spells/unitcurse.c

@@ -345,16 +345,9 @@ const struct curse_type ct_skillmod = {
     NULL, read_skill, write_skill
 };
 
-const struct curse_type ct_fleechance = {
-    "fleechance",
-    CURSETYP_NORM, 0, (M_DURATION | M_VIGOUR),
-    NULL, NULL, NULL, NULL, NULL
-};
-
 /* ------------------------------------------------------------- */
 void register_unitcurse(void)
 {
-    ct_register(&ct_fleechance);
     ct_register(&ct_auraboost);
     ct_register(&ct_magicboost);
     ct_register(&ct_slavery);

src/spells/unitcurse.h

@@ -23,7 +23,6 @@ extern "C" {
     struct curse_type;
     struct message;
 
-    extern const struct curse_type ct_fleechance;
     extern const struct curse_type ct_slavery;
     extern const struct curse_type ct_calmmonster;
     extern const struct curse_type ct_speed;