dependabot: remove all ignored, set interval to weekly

.github/dependabot.yml

@@ -3,46 +3,5 @@ updates:
 - package-ecosystem: cargo
   directory: "/"
   schedule:
-    interval: daily
+    interval: weekly
   open-pull-requests-limit: 10
-  ignore:
-  - dependency-name: regex
-    versions:
-    - 1.4.3
-    - 1.4.4
-  - dependency-name: tokio
-    versions:
-    - 1.1.0
-    - 1.1.1
-    - 1.2.0
-    - 1.3.0
-  - dependency-name: serde
-    versions:
-    - 1.0.123
-    - 1.0.124
-  - dependency-name: serde_json
-    versions:
-    - 1.0.61
-    - 1.0.62
-    - 1.0.63
-    - 1.0.64
-  - dependency-name: once_cell
-    versions:
-    - 1.6.0
-    - 1.7.0
-  - dependency-name: reqwest
-    versions:
-    - 0.11.0
-    - 0.11.1
-  - dependency-name: quick-xml
-    versions:
-    - 0.21.0
-  - dependency-name: anyhow
-    versions:
-    - 1.0.38
-  - dependency-name: futures
-    versions:
-    - 0.3.9
-  - dependency-name: thiserror
-    versions:
-    - 1.0.23