Cleanup PythonEditor and Todo project files

pluginspec.in and dependencies.pri are included by qtcreatorplugin.pri

Change-Id: I05a0ffba320e470216f2272ad39390d04b7f54e2
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

src/plugins/pythoneditor/pythoneditor.pro

 include(../../qtcreatorplugin.pri)
-include(pythoneditor_dependencies.pri)
 
 DEFINES += \
     PYTHONEDITOR_LIBRARY

src/plugins/todo/todo.pro

@@ -30,8 +30,6 @@ SOURCES += todoplugin.cpp \
     qmljstodoitemsscanner.cpp \
     lineparser.cpp \
     todooutputtreeview.cpp
-OTHER_FILES += \
-    Todo.pluginspec.in
 
 RESOURCES += \
     todoplugin.qrc