xargs.1posix -I{} find "{}" -mindepth 1 -delete
construct argument lists and invoke utility
-I  replstr
       Insert mode: utility is executed for each line from standard input, taking the entire  line  as  a
       single  argument,  inserting  it  in  arguments  for each occurrence of replstr. A maximum of five
       arguments in arguments can each contain one or more instances of  replstr.  Any  <blank>s  at  the
       beginning  of each line shall be ignored. Constructed arguments cannot grow larger than 255 bytes.
       Option -x shall be forced on.
-n  number
       Invoke utility using as many standard input arguments  as  possible,  up  to  number  (a  positive
       decimal integer) arguments maximum. Fewer arguments shall be used if:

        * The  command line length accumulated exceeds the size specified by the -s option (or {LINE_MAX}
          if there is no -s option).

        * The last iteration has fewer than number, but not zero, operands remaining.
-p     Prompt mode: the user is asked whether to execute utility at each invocation. Trace mode ( -t)  is
       turned on to write the command instance to be executed, followed by a prompt to standard error. An
       affirmative response read from /dev/tty shall execute  the  command;  otherwise,  that  particular
       invocation of utility shall be skipped.
-t     Enable  trace  mode.  Each generated command line shall be written to standard error just prior to
       invocation.
source manpages: xargs