ProjectExplorer: Remove Project manager parameter from some constructors

Can be done generically when creating projects. The only wart is
the use from BaseQmakeProjectWizardDialog::writeUserFile.

Change-Id: Ie98c9f88ec142e82443e204a0075e3ae9e163752
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/cmakeprojectmanager/cmakeprojectmanager.cpp

@@ -166,7 +166,7 @@ Project *CMakeManager::openProject(const QString &fileName, QString *errorString
         return 0;
     }
 
-    return new CMakeProject(this, file);
+    return new CMakeProject(file);
 }
 
 QString CMakeManager::mimeType() const