Remove the platforms/install_rules directory

src/plugins/platforms/install_rules/fontengine_files/fontengine_files.pro

@@ -1,9 +0,0 @@
-TEMPLATE = subdirs
-
-FILES += \
-    $$QT_SOURCE_TREE/src/gui/text/qfontengine_ft_p.h \
-    $$QT_SOURCE_TREE/src/gui/text/qfontengine_ft.cpp
-
-sources.files = $$FILES
-sources.path = $$[QT_INSTALL_DATA]/platforms/fontdatabases/fontengines
-INSTALLS = sources

src/plugins/platforms/install_rules/freetype/freetype.pro

@@ -1,11 +0,0 @@
-TEMPLATE = subdirs
-
-SRCDIR += \
-    $$QT_SOURCE_TREE/src/3rdparty/freetype/src
-
-INCDIR += \
-    $$QT_SOURCE_TREE/src/3rdparty/freetype/include
-
-sources.files = $$SRCDIR $$INCDIR
-sources.path = $$[QT_INSTALL_DATA]/platforms/fontdatabases/freetype
-INSTALLS = sources

src/plugins/platforms/install_rules/harfbuzz/harfbuzz.pro

@@ -1,12 +0,0 @@
-#This file makes sure that harbuzz gets installed, 
-#so that plugins can be compiled out of source
-TEMPLATE = subdirs
-
-
-SRCDIR += \
-    $$QT_SOURCE_TREE/src/3rdparty/harfbuzz/src
-
-sources.files = $$SRCDIR
-sources.path = $$[QT_INSTALL_DATA]/platforms/fontdatabases/harfbuzz
-INSTALLS = sources
-

src/plugins/platforms/install_rules/install_rules.pro

@@ -1,7 +0,0 @@
-# This is so that additional sources are installed
-# in the QT_INSTALL_DATA directory
-TEMPLATE = subdirs
-
-SUBDIRS += harfbuzz
-SUBDIRS += freetype
-SUBDIRS += fontengine_files

src/plugins/platforms/platforms.pro

@@ -1,22 +1,5 @@
 TEMPLATE = subdirs
 
-#out of source tree plugin setup start
-SUBDIRS += install_rules
-SRCDIRS = \
-    dnd \
-    eglconvenience \
-    fb_base \
-    fontdatabases \
-    glxconvenience \
-    printersupport \
-    wayland
-
-srcdirs.files = $$SRCDIRS
-srcdirs.path = $$[QT_INSTALL_DATA]/platforms
-
-INSTALLS = srcdirs
-#out of source tree plugin setup end
-
 SUBDIRS += minimal
 
 contains(QT_CONFIG, wayland) {