Revert "SystemUI: Enhancement for 4G icons"

This reverts commit c616d428197021c02a3fa951f555cd4502273e61.
Revert "StatusBar: Add icons for Chinese carriers"

This reverts commit 3d59d6907c57975c69913e912803160e4534a88a.
Revert "Statusbar: Add customized icons for signal cluster view"

This reverts commit d2f06d9b836a3ae4ce174b69f28d410b9d45c6ea.
Revert "SystemUI: Add data type and signal icons"

This reverts commit 123e6e706c21c27af1aa44d2c2f40b911162c4ec.