remove example package, add QT parameters to default profile

recipes-core/base-files/base-files_%.bbappend

@@ -1 +1,9 @@
-hostname = "diya"
+hostname = "diya"
+
+do_install:append () {
+    cat << EOF >> "${D}${sysconfdir}/profile"
+# QT related setting
+export QT_QPA_PLATFORM=eglfs
+export QT_QPA_EGLFS_ROTATION=90
+EOF
+}

recipes-core/images/core-image-minimal.bbappend

@@ -31,7 +31,6 @@ IMAGE_INSTALL:append = "libcurl \
                         libsdl2-image \
                         libsdl2-mixer \
                         libsdl2-net \
-                        example \
                         htop \
                         waveshare-2.8-lcd \
                         realtekfw \