Drop legacy MS-DOS config.sh configuration settings

Author: LegalizeAdulthood

config/legacy/CMakeLists.txt

@@ -35,7 +35,6 @@ add_library(legacy INTERFACE
     hints/solaris_2.sh
     hints/sunos.sh
     hints/svr4.sh
-    msdos/config.sh
     U/bin.U
     U/filexp.U
     U/filexp2.U