Mitigated circular dependency (to be fixed)

ref #65

src/models/entities/Participant.ts

@@ -7,10 +7,9 @@ import {
 
   IsString
 } from "class-validator";
-import { Column, Entity, ManyToOne, OneToMany, PrimaryGeneratedColumn, TableInheritance } from "typeorm";
+import { Column, Entity, ManyToOne, PrimaryGeneratedColumn, TableInheritance } from "typeorm";
 import { config } from '../../config';
 import { Address } from "./Address";
-import { Donation } from "./Donation";
 
 /**
  * Defines the Participant entity.
@@ -74,11 +73,4 @@ export abstract class Participant {
   @IsOptional()
   @IsEmail()
   email?: string;
-
-  /**
-   * Used to link the participant as the donor of a donation.
-   * Attention: Only runner's can be associated as a distanceDonations distance source.
-   */
-  @OneToMany(() => Donation, donation => donation.donor, { nullable: true })
-  donations: Donation[];
 }