Merge bitcoin-core#683: doc: Drop no longer relevant comment

5d332da doc: Drop no longer relevant comment (Hennadii Stepanov)

Pull request description:

  The comment was introduced in 4cf3411, and since 7e4bd19 it has been no longer relevant.

ACKs for top commit:
  jarolrod:
    ACK 5d332da

Tree-SHA512: 6d32561336993b1ff7d7c524d090ac52aefb40078ed706ca4c6d5026cc3f63244c49c0e00e45ff192ba0e9f1527faf63249aa18bc8aa677b9e053d387e0f4027

Author: hebasto

src/qt/test/test_main.cpp

@@ -79,8 +79,6 @@ int main(int argc, char* argv[])
         setenv("QT_QPA_PLATFORM", "minimal", 0 /* overwrite */);
     #endif
 
-    // Don't remove this, it's needed to access
-    // QApplication:: and QCoreApplication:: in the tests
     BitcoinApplication app;
     app.setApplicationName("Bitcoin-Qt-test");
     app.createNode(*init);