Revert "Handle the case where "text_file" may be set, but the target file may be empty or missing. (cloudfoundry-community#47)"

This reverts commit 186adf7.

Author: jmcarp

out

@@ -53,7 +53,6 @@ then
 fi
 
 export TEXT_FILE_CONTENT=""
-[[ -n "${text_file}" && ! -f "${text_file}" ]] && text_file=""
 [[ -n "${text_file}" && -f "${text_file}" ]] && TEXT_FILE_CONTENT="$(cat "${text_file}")"
 
 ATTACHMENTS_FILE_CONTENT=""