Remove gdb-6.3-focus-cmd-prev-test.patch this test is now upstream
    
    This upstream commit:
    
      commit 24f3aded1d42f515527e2de7e8e9e26f0b77c932
      Date:   Tue Dec 20 15:01:29 2022 +0000
    
          gdb/testsuite/tui: more testing of the 'focus' command
    
    replaces the tests added in gdb-6.3-focus-cmd-prev-test.patch.  As
    this patch was only adding a test I see no need to back-port the
    upstream commit, we'll pick this up in a later rebase.