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

(cherry picked from commit df5e863fee544c9283e28a21c2788c008d7e3e04)
(cherry picked from commit 4199086084245a32d5a8ec09e1571948f0765c83)

dev-support/bin/create-release

@@ -167,11 +167,6 @@ function run()
   fi
 }
 
-function domd5()
-{
-  run "${MD5SUM}" "${1}" > "${1}.md5"
-}
-
 ## @description  set JAVA_HOME properly
 ## @audience     public
 ## @stability    unstable
@@ -241,11 +236,6 @@ function set_defaults
     fi
   fi
 
-  MD5SUM=$(command -v md5sum)
-  if [[ -z "${MD5SUM}" ]]; then
-    MD5SUM=$(command -v md5)
-  fi
-
   NATIVE=false
   OSNAME=$(uname -s)
 
@@ -601,9 +591,6 @@ function signartifacts
   declare i
 
   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 ""
@@ -615,7 +602,6 @@ 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