[repo] remove no longer used github metadata

Change-Id: Ic166a239c4f5ca5b483b002f534a38d51ed95d93
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/242720
Reviewed-by: Kevin Moore <kevmoo@google.com>
Commit-Queue: Devon Carew <devoncarew@google.com>
Reviewed-by: William Hesse <whesse@google.com>

.github/move.yml

@@ -1,21 +0,0 @@
-# Configuration for move-issues - https://github.com/dessant/move-issues
-
-# Delete the command comment when it contains no other content
-deleteCommand: true
-
-# Close the source issue after moving
-closeSourceIssue: true
-
-# Lock the source issue after moving
-lockSourceIssue: false
-
-# Mention issue and comment authors
-mentionAuthors: true
-
-# Preserve mentions in the issue content
-keepContentMentions: true
-
-# Set custom aliases for targets
-aliases:
-  flutter: flutter/flutter
-  flutter-intellij: flutter/flutter-intellij

.github/no-response.yml

@@ -1,16 +0,0 @@
-# Configuration for probot-no-response - https://github.com/probot/no-response
-
-# Number of days of inactivity before an issue is closed for lack of response.
-daysUntilClose: 21
-
-# Label requiring a response.
-responseRequiredLabel: "needs-info"
-
-# Comment to post when closing an Issue for lack of response.
-closeComment: >-
-  Without additional information, we are unfortunately not sure how to
-  resolve this issue. We are therefore reluctantly going to close this
-  bug for now. Please don't hesitate to comment on the bug if you have
-  any more information for us; we will reopen it right away!
-
-  Thanks for your contribution.