[Fix] remove nvm_supports_source_options

Fixes #2387

nvm.sh

@@ -3931,7 +3931,7 @@ nvm() {
  nvm_has_system_node nvm_has_system_iojs \
  nvm_download nvm_get_latest nvm_has nvm_install_default_packages nvm_get_default_packages \
  nvm_curl_use_compression nvm_curl_version \
- nvm_supports_source_options nvm_auto nvm_supports_xz \
+ nvm_auto nvm_supports_xz \
  nvm_echo nvm_err nvm_grep nvm_cd \
  nvm_die_on_prefix nvm_get_make_jobs nvm_get_minor_version \
  nvm_has_solaris_binary nvm_is_merged_node_version \
@@ -4013,14 +4013,6 @@ nvm_install_default_packages() {
  fi
 }
 
-nvm_supports_source_options() {
- # shellcheck disable=SC1091,SC2240
- [ "_$( . /dev/stdin yes 2> /dev/null <<'EOF'
-[ $# -gt 0 ] && nvm_echo $1
-EOF
- )" = "_yes" ]
-}
-
 nvm_supports_xz() {
  if [ -z "${1-}" ]; then
  return 1
@@ -4108,15 +4100,14 @@ nvm_auto() {
 nvm_process_parameters() {
  local NVM_AUTO_MODE
  NVM_AUTO_MODE='use'
- if nvm_supports_source_options; then
- while [ $# -ne 0 ]; do
- case "$1" in
- --install) NVM_AUTO_MODE='install' ;;
- --no-use) NVM_AUTO_MODE='none' ;;
- esac
- shift
- done
- fi
+ while [ $# -ne 0 ]; do
+ case "$1" in
+ --install) NVM_AUTO_MODE='install' ;;
+ --no-use) NVM_AUTO_MODE='none' ;;
+ esac
+ shift
+ done
+ echo "${NVM_AUTO_MODE}!"
  nvm_auto "${NVM_AUTO_MODE}"
 }