fix: remove model config cache after sdk fix

Author: felixroos

packages/data/src/lib/model-config/model-config.service.ts

@@ -22,7 +22,6 @@ export class ModelConfigService extends Config {
     'modified'
   ];
 
-  modelConfig = {};
 
   /** Injects CrudService and SdkService. */
   constructor(private crud: CrudService,
@@ -121,8 +120,7 @@ export class ModelConfigService extends Config {
    * Utilizes PublicAPI#getFieldConfig + TypeConfigService#get.
    * This config is meant to deliver the default behaviour when nothing else is configured. */
   getFieldConfig(model: string): Promise<FieldConfig> {
-    this.modelConfig[model] = this.modelConfig[model] || this.sdk.api.getFieldConfig(model);
-    return this.modelConfig[model].then((fieldConfig: fields) => {
+    return this.sdk.api.getFieldConfig(model).then((fieldConfig: fields) => {
       const merged = {};
       Object.assign(merged, this.getSystemFields());
       Object.keys(fieldConfig).map(property => fieldConfig[property])