debian/patches: Drop...

debian/patches: Drop 0001_allow-colon-separated-values-in-XDG-CURRENT-DESKTOP.patch, 1001_autotools-pkg-config-macro-not-cross-compilation-safe.patch, 2002_use-dbus-run-session-instead-of-dbus-launch.patch, 2003_allow-gtk3-deprecated-symbols.patch. Rebase 2001_build-using-mate-common.patch.