chore: Adjust open source license configuration

- Removed MIT license file from LICENSES directory
- Eliminated pkg-config dependency from Debian build requirements
- Maintained core build dependencies including cmake, debhelper, and Qt6 toolchain

Log: Update license and build dependencies

Author: add-uos

LICENSES/MIT.txt

@@ -4,7 +4,6 @@ Priority: optional
 Maintainer: Deepin Packages Builder <packages@deepin.com>
 Build-Depends: debhelper (>= 11),
  cmake,
- pkg-config,
  qt6-base-dev,
  qt6-tools-dev,
  qt6-tools-dev-tools,