Fix README.md duplicate (#89)

Just noticed duplicate namespaces mentioned in the docs

Signed-off-by: Israel <[email protected]>

src/CoreEx/README.md

@@ -36,9 +36,6 @@ Namespace | Description
 [`Text.Json`](./Text/Json) | Provides [`System.Text.Json`](https://docs.microsoft.com/en-us/dotnet/api/system.text.json) implementation of the [`IJsonSerializer`](./Json/IJsonSerializer.cs).
 [`Validation`](./Validation) | Provides implementation agnostic validation capabilities.
 [`Wildcards`](./Wildcards) | Provides standardized approach to parsing and validating [`Wildcard`](./Wildcards/Wildcard.cs) text.`
-[`Text.Json`](./Text/Json) | Provides [`System.Text.Json`](https://docs.microsoft.com/en-us/dotnet/api/system.text.json) implementation of the [`IJsonSerializer`](./Json/IJsonSerializer.cs).
-[`Validation`](./Validation) | Provides implementation agnostic validation capabilities.
-[`Wildcards`](./Wildcards) | Provides standardized approach to parsing and validating [`Wildcard`](./Wildcards/Wildcard.cs) text. 
 
 <br/>
 
@@ -65,4 +62,4 @@ Exception | Description | HTTP Status | [`ErrorType`](./Abstractions/ErrorType.c
 [`DuplicateException`](./DuplicateException.cs) | Represents a **Duplicate** exception; for example updating a code on an entity where the value is already used. | 409 Conflict | 7 DuplicateError 
 [`NotFoundException`](./NotFoundException.cs) | Represents a **NotFound** exception; for example getting an entity that does not exist. | 404 NotFound | 5 NotFoundError 
 [`TransientException`](./TransientException.cs) | Represents a **Transient** exception; failed but is a candidate for a retry. | 503 ServiceUnavailable | 9 TransientError 
-[`ValidationException`](./ValidationException.cs) | Represents a **Validation** exception with a corresponding `Messages` [collection](./Entities/MessageItemCollection.cs). | 400 BadRequest | 1 ValidationError 
+[`ValidationException`](./ValidationException.cs) | Represents a **Validation** exception with a corresponding `Messages` [collection](./Entities/MessageItemCollection.cs). | 400 BadRequest | 1 ValidationError