Remove references to notes that are not in this repository

Comments added with the lazy folios cited planning notes kept outside the
QElectroTech repository, which a reader of the source cannot open. The
sentences now stand on their own.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/qttest/lazy_folios_probe.cpp

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
-// Lazy folios (QET_LAZY_FOLIOS, LAZY-FOLIO-PLAN.md stages 5.2 and 5.3),
+// Lazy folios (QET_LAZY_FOLIOS),
 // linked against the application's objects: a folio shown in a project
 // opened without building its folios draws and links as in the project
 // opened as usual, building only it and the folios its links and tables

tests/qttest/tst_resaveunchanged.cpp

@@ -340,8 +340,8 @@ private slots:
 		return QString::fromUtf8(proc.readAllStandardOutput() + proc.readAllStandardError());
 	}
 
-	// The stores of symbol information and folio title blocks
-	// (DB-ACCESSORS-PLAN.md stages 4.1, 4.4) agree with every placed symbol
+	// The stores of symbol information and folio title blocks agree with
+	// every placed symbol
 	// and folio once a project is open: every example.
 	void elementInfoStoreAgrees_data()
 	{
@@ -361,7 +361,7 @@ private slots:
 	}
 
 	// The stores filled from the document before the folios are built
-	// (DB-ACCESSORS-PLAN.md stage 4.6) hold what building them gives, for a
+	// hold what building them gives, for a
 	// project saved by this version (every symbol, folio and wire carries
 	// a uuid): nothing differs, nothing is left unplaced.
 	void storesFilledBeforeBuilding()