Merge bitcoin/bitcoin#24404: refactor: Remove confusing P1008R1 violation in ATMPArgs

faa1aec26b3f354c832e6b995323c9429b178931 Remove confusing P1008R1 violation in ATMPArgs (MarcoFalke)

Pull request description:

  The `= delete` doesn't achieve the stated goal and it is also redundant, since it is not possible to default construct the `ATMPArgs` type.

  This can be tested with:

  ```diff
  diff --git a/src/validation.cpp b/src/validation.cpp
  index 2813b62462..1c939c0b8a 100644
  --- a/src/validation.cpp
  +++ b/src/validation.cpp
  @@ -519,6 +519,7 @@ public:
           /** Parameters for child-with-unconfirmed-parents package validation. */
           static ATMPArgs PackageChildWithParents(const CChainParams& chainparams, int64_t accept_time,
                                                   std::vector<COutPoint>& coins_to_uncache) {
  +            ATMPArgs{};
               return ATMPArgs{/* m_chainparams */ chainparams,
                               /* m_accept_time */ accept_time,
                               /* m_bypass_limits */ false,
  ```

  Which fails on current master *and* this pull with the following error:

  ```
  validation.cpp:525:22: error: reference member of type 'const CChainParams &' uninitialized
              ATMPArgs{};
                      ~^
  validation.cpp:470:29: note: uninitialized reference member is here
          const CChainParams& m_chainparams;
                              ^
  1 error generated.
  ```

  Further reading (optional):
  * http://open-std.org/JTC1/SC22/WG21/docs/papers/2018/p1008r1.pdf

ACKs for top commit:
  achow101:
    ACK faa1aec26b3f354c832e6b995323c9429b178931
  glozow:
    code review ACK faa1aec26b3f354c832e6b995323c9429b178931

Tree-SHA512: 16db2c9959a1996eafbfa533dc4d1483761b9d28295aed5a82b86abd7268da37c51c59ddc67c205165ecb415dbe637b12a0e1b3234d50ab0b3b79de66d7bd73e

0 files changed, 0 insertions, 0 deletions