Remove external_url input when creating an investment

The input was removed via consuldemocracy#2280 but due to conflict resolution, it was
accidentally re-introduced. This commit removes it altogether as well
as its associated I18n keys

app/views/budgets/investments/_form.html.erb

@@ -3,7 +3,7 @@
 
  <div class="row">
  <div class="small-12 medium-9 column">
- <%= f.select :heading_id, budget_heading_select_options(@budget), { include_blank: true, } %>
+ <%= f.select :heading_id, budget_heading_select_options(@budget), { include_blank: true } %>
  </div>
  </div>
 
@@ -31,14 +31,6 @@
  </div>
  </div>
 
- <div class="row">
- <div class="small-12 medium-9 column">
- <%= f.text_field :external_url, data: { toggle_focus: "external-url-suggestions" } %>
- </div>
- <%= render "shared/suggest_message", id: "external-url-suggestions",
- message: t("spending_proposals.suggestions.external_url") %>
- </div>
-
  <% if feature?(:allow_images) %>
  <div class="row">
  <div class="images small-12 column">
@@ -82,7 +74,7 @@
 
  <div class="row">
  <div class="small-12 medium-9 column">
- <%= f.text_field :organization_name, data: {toggle_focus: "organization-name-suggestions"} %>
+ <%= f.text_field :organization_name, data: { toggle_focus: "organization-name-suggestions" } %>
  </div>
  <%= render "shared/suggest_message", id: "organization-name-suggestions",
  message: t("spending_proposals.suggestions.organization_name") %>

config/locales/en/general.yml

@@ -691,7 +691,6 @@ en:
  zero: No supports
  suggestions:
  title: "Do not use capital letters for the project title or for whole sentences. On the internet, this is considered shouting. And nobody likes being shouted at."
- external_url: "There is not enough space for the project development? Include an URL to let people access more information about it."
  location: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
  organization_name: "Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat."
  tag_list: "Tagging your project correctly makes its search easier and may be voted more."

config/locales/es/general.yml

@@ -690,7 +690,6 @@ es:
  other: "%{count} apoyos"
  suggestions:
  title: "No escribas el título del pryecto o frases enteras en mayúsculas. En internet eso se considera gritar, y a nadie le gusta que le griten."
- external_url: "¿Se te ha quedado pequeño el espacio para la propuesta? Incluye un enlace para poder tener acceso a más información."
  location: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."
  organization_name: "Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat."
  tag_list: "Etiquetar correctamente un proyecto hace que su búsqueda sea más sencilla y tiene más posibilidades de conseguir apoyos."