Remove Usage examples (#31)

Author: robwittman

README.md

@@ -130,5 +130,3 @@ foreach ($product->variants as $variant) {
 [Shopify Partner Login](https://partners.shopify.com)
 
 [Shopify API Reference](https://help.shopify.com/api/reference)
-
-[SDK Usage Examples](https://github.com/RobbyBugatti/shopify-php/examples)