SWDEV-272921 - Remove non-existing link for square sample

Change-Id: If8c87a6ded6aacaa4301b1b80ee218897219a6fb

samples/0_Intro/square/README.md

@@ -1,8 +1,6 @@
 # Square.md
 
-Simple test which shows how to use hipify-perl to port CUDA code to HIP.
-See related [blog](http://gpuopen.com/hip-to-be-squared-an-introductory-hip-tutorial) that explains the example.
-Now it is even simpler and requires no manual modification to the hipified source code - just hipify and compile:
+Simple test below is an example, shows how to use hipify-perl to port CUDA code to HIP:
 
 - Add hip/bin path to the PATH