MAGETWO-36298: [GITHUB] change to HttpClient4 from Java client; fix regex issues #1173

- Per code review suggestion, removed Testing Environment section.

Author: Susan Wright

dev/tools/performance-toolkit/README.txt

@@ -85,22 +85,3 @@ Details http://jmeter.apache.org/usermanual/component_reference.html#View_Result
 
 About other types read on
 http://jmeter.apache.org/usermanual/component_reference.html
-
-
-Testing environment
------------
-
-jMeter: apache-jmeter-2.12
-OS (where jMeter is running): Windows 7 SP1
-Server (where Magento is hosted): Intel(R) Core(TM)2 Duo CPU T7700  @2.40GHz, memtotal 4gb.
-PHP:  5.4.19 (memory_limit 2Gb)
-MySQL: 5.5.29 MySQL Community Server
-Magento version:  ver. 2.0.0.0-dev70 (rev 16b68a0f8e0fad4375f33b7238e2f2964ac3aadc)
-Magento database (Small plan in Fixture Generation Tool):
-jMeter parameters (all default parameters):
-  users: 100
-  ramp_period: 300
-  view_product_add_to_cart_percent: 62
-  view_catalog_percent: 30
-  guest_checkout_percent: 4
-  customer_checkout_percent: 4