[MSHADE-326] Remove bad workspace cache which caused problems in maven-shade-plugin.

Author: nielsbasjes

maven-resolver-provider/src/main/java/org/apache/maven/repository/internal/DefaultArtifactDescriptorReader.java

@@ -257,16 +257,6 @@ private Model loadPom( RepositorySystemSession session, ArtifactDescriptorReques
 
             Model model;
 
-            final WorkspaceReader workspace = session.getWorkspaceReader();
-            if ( workspace instanceof MavenWorkspaceReader )
-            {
-                model = ( (MavenWorkspaceReader) workspace ).findModel( pomArtifact );
-                if ( model != null )
-                {
-                    return model;
-                }
-            }
-
             try
             {
                 ModelBuildingRequest modelRequest = new DefaultModelBuildingRequest();