refactor(@schematics/angular): remove usage of deprecated defaultProject

This option is deprecated in Angular CLI and will be removed in a future major version.

Author: alan-agius4

packages/schematics/angular/application/index.ts

@@ -231,10 +231,6 @@ function addAppToWorkspaceFile(
   };
 
   return updateWorkspace((workspace) => {
-    if (workspace.projects.size === 0) {
-      workspace.extensions.defaultProject = options.name;
-    }
-
     workspace.projects.add({
       name: options.name,
       ...project,

packages/schematics/angular/application/index_spec.ts

@@ -80,7 +80,6 @@ describe('Application Schematic', () => {
       .toPromise();
     const workspace = JSON.parse(tree.readContent('/angular.json'));
     expect(workspace.projects.foo).toBeDefined();
-    expect(workspace.defaultProject).toBe('foo');
   });
 
   it('should set the prefix to app if none is set', async () => {

packages/schematics/angular/library/index.ts

@@ -82,10 +82,6 @@ function addLibToWorkspaceFile(
   projectName: string,
 ): Rule {
   return updateWorkspace((workspace) => {
-    if (workspace.projects.size === 0) {
-      workspace.extensions.defaultProject = projectName;
-    }
-
     workspace.projects.add({
       name: projectName,
       root: projectRoot,

packages/schematics/angular/library/index_spec.ts

@@ -131,7 +131,6 @@ describe('Library Schematic', () => {
 
     const workspace = getJsonFileContent(tree, '/angular.json');
     expect(workspace.projects.foo).toBeDefined();
-    expect(workspace.defaultProject).toBe('foo');
   });
 
   it('should set the prefix to lib if none is set', async () => {