Project: Remove knowsAllBuildExecutables feature

This is feature is no longer needed.

Change-Id: Ia0798402fcb4c06fb4dd38225359738306211176
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Alexis Jeandet <alexis.jeandet@member.fsf.org>
Reviewed-by: hjk <hjk@qt.io>

src/plugins/cmakeprojectmanager/cmakeproject.cpp

@@ -58,7 +58,6 @@ CMakeProject::CMakeProject(const FilePath &fileName)
     setProjectLanguages(Core::Context(ProjectExplorer::Constants::CXX_LANGUAGE_ID));
     setDisplayName(projectDirectory().fileName());
     setCanBuildProducts();
-    setKnowsAllBuildExecutables(true);
     setHasMakeInstallEquivalent(true);
 }