Remove qmake build files

Removes qmake as a build system for building Qt Creator itself.
Keep them for some tests that are not completely moved to CMake yet.

Change-Id: I846c6ef65626b6dfae6375fdc85d00677aa8c2fb
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Christian Kandeler <christian.kandeler@qt.io>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/todo/todo.pro

@@ -1,45 +0,0 @@
-include(../../qtcreatorplugin.pri)
-
-HEADERS += todoplugin.h \
-    keyword.h \
-    constants.h \
-    todooutputpane.h \
-    todoitem.h \
-    settings.h \
-    optionsdialog.h\
-    keyworddialog.h \
-    todoitemsprovider.h \
-    todoitemsmodel.h \
-    todoitemsscanner.h \
-    cpptodoitemsscanner.h \
-    qmljstodoitemsscanner.h \
-    lineparser.h \
-    todooutputtreeview.h \
-    todooutputtreeviewdelegate.h \
-    todoprojectsettingswidget.h \
-    todoicons.h
-
-SOURCES += todoplugin.cpp \
-    keyword.cpp \
-    todooutputpane.cpp \
-    settings.cpp \
-    optionsdialog.cpp \
-    keyworddialog.cpp \
-    todoitemsprovider.cpp \
-    todoitemsmodel.cpp \
-    todoitemsscanner.cpp \
-    cpptodoitemsscanner.cpp \
-    qmljstodoitemsscanner.cpp \
-    lineparser.cpp \
-    todooutputtreeview.cpp \
-    todooutputtreeviewdelegate.cpp \
-    todoprojectsettingswidget.cpp \
-    todoicons.cpp
-
-RESOURCES += \
-    todoplugin.qrc
-
-FORMS += \
-    optionsdialog.ui \
-    keyworddialog.ui \
-    todoprojectsettingswidget.ui

src/plugins/todo/todo_dependencies.pri

@@ -1,10 +0,0 @@
-QTC_PLUGIN_NAME = Todo
-QTC_LIB_DEPENDS += \
-    cplusplus \
-    extensionsystem \
-    qmljs \
-    utils
-QTC_PLUGIN_DEPENDS += \
-    coreplugin \
-    projectexplorer \
-    cppeditor