Fix multi-config builds

Hopefully, this corrects the handling of the different
configs like Debug, Release, etc, when dealing with
multi-config generators.

cmake-proxies/libid3tag/CMakeLists.txt

@@ -5,7 +5,6 @@ list( APPEND SOURCES
    PRIVATE
       ${TARGET_ROOT}/compat.c
       ${TARGET_ROOT}/crc.c
-      $<$<STREQUAL:${CMAKE_BUILD_TYPE},Debug>:${TARGET_ROOT}/debug.c>
       ${TARGET_ROOT}/field.c
       ${TARGET_ROOT}/file.c
       ${TARGET_ROOT}/frame.c