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/classview/classview.pro

@@ -1,26 +0,0 @@
-include(../../qtcreatorplugin.pri)
-
-HEADERS += \
-    classviewconstants.h \
-    classviewmanager.h \
-    classviewnavigationwidget.h \
-    classviewnavigationwidgetfactory.h \
-    classviewparser.h \
-    classviewparsertreeitem.h \
-    classviewplugin.h \
-    classviewsymbolinformation.h \
-    classviewsymbollocation.h \
-    classviewtreeitemmodel.h \
-    classviewutils.h
-
-SOURCES += \
-    classviewmanager.cpp \
-    classviewnavigationwidget.cpp \
-    classviewnavigationwidgetfactory.cpp \
-    classviewparser.cpp \
-    classviewparsertreeitem.cpp \
-    classviewplugin.cpp \
-    classviewsymbolinformation.cpp \
-    classviewsymbollocation.cpp \
-    classviewtreeitemmodel.cpp \
-    classviewutils.cpp

src/plugins/classview/classview_dependencies.pri

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