Merge #17503: doc: Remove bitness from bitcoin-qt help message and manpage

e161bc7 doc: Remove bitness from bitcoin-qt help message and manpage (Wladimir J. van der Laan)

Pull request description:

  Remove the `(64-bit)` from the bitcoin-qt help message.

  Since removing the Windows 32-bit builds, it is no longer information that is often useful for troubleshooting. This never worked for other architectures than x86, and the only 32-bit x86 build left is the Linux one. Linux users tend to know what architecture they are using.

  It also accidentally ends up in the bitcoin-qt manpage (if you happen to be generating them on a x86 machine), which gets checked in. See for example bitcoin/bitcoin@1bc9988#diff-e4b84be382c8ea33b83203ceb8c85296

ACKs for top commit:
  practicalswift:
    ACK e161bc7 -- rationale makes sense and diff looks correct :)
  MarcoFalke:
    Tested ACK e161bc7 🔮

Tree-SHA512: d38754903252896dc86fac6c12ad6615d322c2744db7c02b18574a08c69e8876b2c905e1f09b324002236b111ee93479f89769c562e7b3b2e6eb2992d76464ef

Author: MarcoFalke

src/qt/utilitydialog.cpp

@@ -34,14 +34,6 @@ HelpMessageDialog::HelpMessageDialog(interfaces::Node& node, QWidget *parent, bo
     ui->setupUi(this);
 
     QString version = QString{PACKAGE_NAME} + " " + tr("version") + " " + QString::fromStdString(FormatFullVersion());
-    /* On x86 add a bit specifier to the version so that users can distinguish between
-     * 32 and 64 bit builds. On other architectures, 32/64 bit may be more ambiguous.
-     */
-#if defined(__x86_64__)
-    version += " " + tr("(%1-bit)").arg(64);
-#elif defined(__i386__ )
-    version += " " + tr("(%1-bit)").arg(32);
-#endif
 
     if (about)
     {