benchmark: remove extra spacing in http options

This commit removes the benchmark spacing modification in
`client-request-body.js` and `end-vs-write-end.js` which adds two spaces
to the end of some variables to make sure the lines line up.

The reason behind this is that its totally pointless (the lines don't
actually line up with it) and it disallows you to parse the output with
a tool like awk, or at least makes it a lot harder.

PR-URL: #650
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

benchmark/http/client-request-body.js

@@ -7,7 +7,7 @@ var bench = common.createBenchmark(main, {
   dur: [5],
   type: ['asc', 'utf', 'buf'],
   bytes: [32, 256, 1024],
-  method: ['write', 'end  '] // two spaces added to line up each row
+  method: ['write', 'end']
 });
 
 function main(conf) {

benchmark/http/end-vs-write-end.js

@@ -14,7 +14,7 @@ var bench = common.createBenchmark(main, {
   type: ['asc', 'utf', 'buf'],
   kb: [64, 128, 256, 1024],
   c: [100],
-  method: ['write', 'end  '] // two spaces added to line up each row
+  method: ['write', 'end']
 });
 
 function main(conf) {