remove the metadata.icon docs

docs/blueprint-designer-guide/blueprints/blueprints-yaml-structure.md

@@ -554,7 +554,6 @@ description: ...
 metadata:
   self-service: true
   display-name: "My Custom Blueprint"
-  icon: "database"
 
 grains: ...
 ```
@@ -577,15 +576,6 @@ metadata:
   display-name: "Production Web Application Stack"
 ```
 
-#### `icon`
-
-Defines the icon that will be displayed for the blueprint in the Torque catalog. This helps users quickly identify and distinguish between different blueprints.
-
-```yaml
-metadata:
-  icon: "database"
-```
-
 ## Grains inputs & outputs
 Inputs and outputs are used both in the blueprint level and in the grains level. Grains can use inputs and outputs to pass data between IaC components, validate information and eventually lead to reducing the amount of IaC components that needs to be maintained by the organization.
 
@@ -1280,4 +1270,4 @@ The `visible` property uses Liquid templating syntax to create dynamic condition
 
 **Useful Liquid Templating Resources:**
 - [Liquid Templating Introduction](https://shopify.github.io/liquid/basics/introduction/) - Learn the basics and syntax of Liquid templating
-- [Liquid Playground](https://liquidjs.com/playground.html) - Interactive playground to test and experiment with Liquid expressions
+- [Liquid Playground](https://liquidjs.com/playground.html) - Interactive playground to test and experiment with Liquid expressions