Revert "Add AddReceiver method and refactor SQL classes"

This reverts commit 1b515ea904.

EnvelopeGenerator.Application/SQL/EnvelopeReceiverAddReadSQL.cs

@@ -1,33 +0,0 @@
-using EnvelopeGenerator.Application.Contracts.SQLExecutor;
-using EnvelopeGenerator.Domain.Entities;
-
-namespace EnvelopeGenerator.Application.SQL;
-
-/// <summary>
-/// 
-/// </summary>
-public class EnvelopeReceiverAddReadSQL : ISQL<Envelope>
-{
-    /// <summary>
-    /// 
-    /// </summary>
-    public string Raw => @"
-		USE [DD_ECM]
-		GO
-
-		DECLARE	@OUT_RECEIVER_ID int
-
-		DECLARE	@ENV_UID varchar(36) = @ENV_UID
-
-		EXEC	[dbo].[PRSIG_API_CREATE_RECEIVER]
-				@ENV_UID = @ENV_UID,
-				@EMAIL_ADRESS = @EMAIL_ADRESS ,
-				@SALUTATION = @SALUTATION,
-				@PHONE = @PHONE,
-				@OUT_RECEIVER_ID = @OUT_RECEIVER_ID OUTPUT
-
-		SELECT TOP(1) *
-		FROM TBSIG_ENVELOPE_RECEIVER
-		WHERE [GUID] = @OUT_RECEIVER_ID;
-	";
-}