fix(github): remove the team from issue template assignees

Issue forms can only assign users, so assigning edera-dev/engineering
did nothing. Remove it rather than leave an assignment that never
happens.

.github/ISSUE_TEMPLATE/bug-report.yml

@@ -3,8 +3,6 @@ description: File a bug report.
 title: "bug: "
 labels: ["bug", "triage"]
 type: bug
-assignees:
-- edera-dev/engineering
 body:
 - type: markdown
   attributes:

.github/ISSUE_TEMPLATE/feature-request.yml

@@ -3,8 +3,6 @@ description: Request a feature.
 title: "want: "
 labels: ["enhancement", "triage"]
 type: feature
-assignees:
-- edera-dev/engineering
 body:
 - type: markdown
   attributes: