Remove outdated performance section from README

The section on the early performance of v1.0 is no longer relevant and has been removed for clarity. This ensures the README remains up-to-date and focused on current information.

Author: mikepapadim

README.md

@@ -529,12 +529,6 @@ The secret sauce that transforms regular Java code into GPU-accelerated compute
 -----------
 
 
-## Early performance of v1.0
-
-![GPULlama3.java Performance Comparison](./docs/performance.png)
-
------------
-
 ## License