chore: remove unused code

This is code from the ajax.org origin. There is only one parameter of type Object which is "file", and file is not a query parameter, so this code is never reached

Author: gr2m

lib/index.js

@@ -543,33 +543,25 @@ var Client = module.exports = function (config) {
       var isUrlParam = url.indexOf(':' + paramName) !== -1
       var valFormat = isUrlParam || format !== 'json' ? 'query' : format
       var val
-      if (valFormat !== 'json') {
-        if (typeof msg[paramName] === 'object') {
-          try {
-            msg[paramName] = JSON.stringify(msg[paramName])
-            val = encodeURIComponent(msg[paramName])
-          } catch (ex) {
-            return debug('error:', 'httpSend: Error while converting object to JSON: ' +
-                            (ex.message || ex))
-          }
-        } else if (def.params[paramName] && def.params[paramName].combined) {
-                    // Check if this is a combined (search) string.
+      if (valFormat === 'json') {
+        val = msg[paramName]
+      } else {
+        if (def.params[paramName] && def.params[paramName].combined) {
+          // Check if this is a combined (search) string.
           val = msg[paramName].split(/[\s\t\r\n]*\+[\s\t\r\n]*/)
-                                        .map(function (part) {
-                                          return encodeURIComponent(part)
-                                        })
-                                        .join('+')
+            .map(function (part) {
+              return encodeURIComponent(part)
+            })
+            .join('+')
         } else {
-                    // the ref param is a path so we don't want to [fully] encode it but we do want to encode the # if there is one
-                    // (see https://github.com/mikedeboer/node-github/issues/499#issuecomment-280093040)
+          // the ref param is a path so we don't want to [fully] encode it but we do want to encode the # if there is one
+          // (see https://github.com/mikedeboer/node-github/issues/499#issuecomment-280093040)
           if (paramName === 'ref') {
             val = msg[paramName].replace(/#/g, '%23')
           } else {
             val = encodeURIComponent(msg[paramName])
           }
         }
-      } else {
-        val = msg[paramName]
       }
 
       if (isUrlParam) {