fix: Remove the GuStackParameter construct

A CFN parameter for the stack name is not necessary when defining a stack with GuCDK.

Indeed since #243, `GuStack` takes a mandatory string for `stack` in it's constructor.
Due to the changes in #243, it follows that `GuStackParameter` is never used and is dead code.

src/constructs/core/parameters/identity.ts

@@ -11,12 +11,3 @@ export class GuStageParameter extends GuStringParameter {
     });
   }
 }
-
-export class GuStackParameter extends GuStringParameter {
-  constructor(scope: GuStack) {
-    super(scope, "Stack", {
-      description: "Name of this stack",
-      default: "deploy",
-    });
-  }
-}