chore: remove duplicated IValidation definition (#1091)

The interface `IValidation` was defined twice in this code. I delete the duplicate, whose lines were to 100% identical to the ones from line 480.

Fixes #1095

Author: ThomasSteinbach

API.md

@@ -481,8 +481,6 @@ deployed.
 ## interface IValidation  <a id="constructs-ivalidation"></a>
 
 
-Implement this interface in order for the construct to be able to validate itself.
-
 Implement this interface in order for the construct to be able to validate itself.
 ### Methods
 
@@ -491,10 +489,6 @@ Implement this interface in order for the construct to be able to validate itsel
 
 Validate the current construct.
 
-This method can be implemented by derived constructs in order to perform
-validation logic. It is called on all constructs before synthesis.
-Validate the current construct.
-
 This method can be implemented by derived constructs in order to perform
 validation logic. It is called on all constructs before synthesis.
 

src/construct.ts

@@ -506,21 +506,6 @@ export enum ConstructOrder {
   POSTORDER
 }
 
-/**
- * Implement this interface in order for the construct to be able to validate itself.
- */
-export interface IValidation {
-  /**
-   * Validate the current construct.
-   *
-   * This method can be implemented by derived constructs in order to perform
-   * validation logic. It is called on all constructs before synthesis.
-   *
-   * @returns An array of validation error messages, or an empty array if there the construct is valid.
-   */
-  validate(): string[];
-}
-
 const PATH_SEP_REGEX = new RegExp(`${Node.PATH_SEP}`, 'g');
 
 /**