Allow removing investment supports by default

When we added this setting in commit 9979b5399, we disabled it by
default so it would be compatible with existing installations.

Since then, we've released version 1.4, which adds the settings to
existing databases. That means we can now enable it by default and
existing installations won't be affected.

app/models/setting.rb

@@ -102,7 +102,7 @@ class Setting < ApplicationRecord
         "feature.graphql_api": true,
         "feature.sdg": true,
         "feature.machine_learning": false,
-        "feature.remove_investments_supports": false,
+        "feature.remove_investments_supports": true,
         "homepage.widgets.feeds.debates": true,
         "homepage.widgets.feeds.processes": true,
         "homepage.widgets.feeds.proposals": true,

db/dev_seeds/settings.rb

@@ -5,7 +5,6 @@ section "Creating Settings" do
     "facebook_handle": "CONSUL",
     "feature.featured_proposals": "true",
     "feature.map": "true",
-    "feature.remove_investments_supports": true,
     "instagram_handle": "CONSUL",
     "mailer_from_address": "noreply@consul.dev",
     "mailer_from_name": "CONSUL",