HADOOP-15930. Exclude MD5 checksum files from release artifact.

(cherry picked from commit df5e863fee)

dev-support/bin/create-release

@@ -169,11 +169,6 @@ function run()
   fi
 }
 
-function domd5()
-{
-  run "${MD5SUM}" "${1}" > "${1}.md5"
-}
-
 function header()
 {
   echo
@@ -235,11 +230,6 @@ function set_defaults
     fi
   fi
 
-  MD5SUM=$(command -v md5sum)
-  if [[ -z "${MD5SUM}" ]]; then
-    MD5SUM=$(command -v md5)
-  fi
-
   NATIVE=false
   OSNAME=$(uname -s)
 
@@ -641,9 +631,6 @@ function signartifacts
   declare ret
 
   if [[ "${SIGN}" = false ]]; then
-    for i in ${ARTIFACTS_DIR}/*; do
-      domd5 "${i}"
-    done
     echo ""
     echo "Remember to sign the artifacts before staging them on the open"
     echo ""
@@ -655,7 +642,6 @@ function signartifacts
   for i in ${ARTIFACTS_DIR}/*; do
     ${GPG} --use-agent --armor --output "${i}.asc" --detach-sig "${i}"
     ${GPG} --print-mds "${i}" > "${i}.mds"
-    domd5 "${i}"
   done
 
   if [[ "${ASFRELEASE}" = true ]]; then