add 'remove' to Multi

tiramisu/value.py

@@ -924,6 +924,10 @@ class Multi(list):
         self._store(force=force)
         return ret
 
+    def remove(self, value):
+        idx = self.index(value)
+        return self.pop(idx)
+
     def _store(self, force=False, index=None):
         values = self._getcontext().cfgimpl_get_values()
         if not force: