Revert "provide a more general purpose request function"

This reverts commit aa86652db8.

This is not actually necessary and can be accomplished with the post
function.

acme.sh

@@ -1592,17 +1592,12 @@ _post() {
   return $_ret
 }
 
-_get() {
-  _request "$1" "$2" "$3" GET
-}
-
 # url getheader timeout
-_request() {
+_get() {
+  _debug GET
   url="$1"
   onlyheader="$2"
   t="$3"
-  method="$4"
-  _debug method $method
   _debug url "$url"
   _debug "timeout" "$t"
 
@@ -1616,9 +1611,6 @@ _request() {
     if [ "$t" ]; then
       _CURL="$_CURL --connect-timeout $t"
     fi
-    if [ "$method" ]; then
-      _CURL="$_CURL -X $method"
-    fi
     _debug "_CURL" "$_CURL"
     if [ "$onlyheader" ]; then
       $_CURL -I --user-agent "$USER_AGENT" -H "$_H1" -H "$_H2" -H "$_H3" -H "$_H4" -H "$_H5" "$url"
@@ -1641,9 +1633,6 @@ _request() {
     if [ "$t" ]; then
       _WGET="$_WGET --timeout=$t"
     fi
-    if [ "$method" ]; then
-      _WGET="$_WGET --method=$method"
-    fi
     _debug "_WGET" "$_WGET"
     if [ "$onlyheader" ]; then
       $_WGET --user-agent="$USER_AGENT" --header "$_H5" --header "$_H4" --header "$_H3" --header "$_H2" --header "$_H1" -S -O /dev/null "$url" 2>&1 | sed 's/^[ ]*//g'