Remove two invalid urls

- https://github.com/cncf/artwork/blob/master/examples/incubating.md#opa-logos is not a valid stackoverflow…
- https://www.idemproject.io/general-8 is not a valid repository url

Signed-off-by: Cintia Sanchez Garcia <cynthiasg@icloud.com>

landscape.yml

@@ -156,7 +156,6 @@ landscape:
               Idem reduces your cloud configuration to data – for you! Instead of Infrastructure as Code, Idem delivers Infrastructure as Data. The cloud
               becomes simplified, easier to maintain, easier to discover, and easier to use.
             homepage_url: https://www.idemproject.io
-            repo_url: https://www.idemproject.io/general-8
             logo: idem-project.svg
             twitter: https://twitter.com/idem_project
             crunchbase: https://www.crunchbase.com/organization/vmware
@@ -1332,7 +1331,6 @@ landscape:
                 - https://github.com/cncf/tag-security
               dev_stats_url: https://opa.devstats.cncf.io/
               artwork_url: https://github.com/cncf/artwork/blob/master/examples/incubating.md#opa-logos
-              stack_overflow_url: https://github.com/cncf/artwork/blob/master/examples/incubating.md#opa-logos
               blog_url: https://blog.openpolicyagent.org/
               slack_url: http://slack.openpolicyagent.org/
               clomonitor_name: opa