message: rpc: remove scantxoutset EXPERIMENTAL warning
diff: @@ -2005,7 +2005,6 @@ public:
  static RPCHelpMan scantxoutset()
  {
  return RPCHelpMan{"scantxoutset",
  - "\nEXPERIMENTAL warning: this call may be removed or changed in future releases.\n"
  "\nScans the unspent transaction output set for entries that match certain output descriptors.\n"
  "Examples of output descriptors are:\n"
  " addr(<address>) Outputs whose scriptPubKey corresponds to the specified address (does not include P2PK)\n"
  