fix(curriculum): remove isRequired from portuguese

curriculum/challenges/portuguese/01-responsive-web-design/responsive-web-design-projects/build-a-personal-portfolio-webpage.portuguese.md

@@ -1,7 +1,6 @@
 ---
 id: bd7158d8c242eddfaeb5bd13
 title: Build a Personal Portfolio Webpage
-isRequired: true
 challengeType: 3
 videoUrl: ''
 localeTitle: Criar uma página da Web de portfólio pessoal

curriculum/challenges/portuguese/01-responsive-web-design/responsive-web-design-projects/build-a-product-landing-page.portuguese.md

@@ -1,7 +1,6 @@
 ---
 id: 587d78af367417b2b2512b04
 title: Build a Product Landing Page
-isRequired: true
 challengeType: 3
 videoUrl: ''
 localeTitle: Construa uma página de destino do produto

curriculum/challenges/portuguese/01-responsive-web-design/responsive-web-design-projects/build-a-survey-form.portuguese.md

@@ -1,7 +1,6 @@
 ---
 id: 587d78af367417b2b2512b03
 title: Build a Survey Form
-isRequired: true
 challengeType: 3
 videoUrl: ''
 localeTitle: Criar um formulário de pesquisa

curriculum/challenges/portuguese/01-responsive-web-design/responsive-web-design-projects/build-a-technical-documentation-page.portuguese.md

@@ -1,7 +1,6 @@
 ---
 id: 587d78b0367417b2b2512b05
 title: Build a Technical Documentation Page
-isRequired: true
 challengeType: 3
 videoUrl: ''
 localeTitle: Construa uma Página de Documentação Técnica

curriculum/challenges/portuguese/01-responsive-web-design/responsive-web-design-projects/build-a-tribute-page.portuguese.md

@@ -1,7 +1,6 @@
 ---
 id: bd7158d8c442eddfaeb5bd18
 title: Build a Tribute Page
-isRequired: true
 challengeType: 3
 videoUrl: ''
 localeTitle: Construa uma página de homenagem