buildconf: use find -execdir instead, remove -print and the ares files

Follow-up to 1e41bec96a

Suggested-by: Marc Hörsken

buildconf

@@ -6,7 +6,7 @@
 #                            | (__| |_| |  _ <| |___
 #                             \___|\___/|_| \_\_____|
 #
-# Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
 #
 # This software is licensed as described in the file COPYING, which
 # you should have received as part of this distribution. The terms
@@ -64,7 +64,7 @@ findtool(){
 #
 removethis(){
   if test "$#" = "1"; then
-    find . -depth -name $1 -print -exec rm -rf {} \;
+    find . -depth -name $1 -execdir rm -rf {} \;
   fi
 }
 
@@ -282,9 +282,6 @@ for fname in .deps \
     Makefile.in \
     aclocal.m4 \
     aclocal.m4.bak \
-    ares_build.h \
-    ares_config.h \
-    ares_config.h.in \
     autom4te.cache \
     compile \
     config.guess \