Remove Branch Ecosystem Declarations

These may have been added in error. Removing until it's clear
if they are needed

Signed-off-by: Josh Cummings <3627351+jzheaux@users.noreply.github.com>

.github/dependabot.yml

@@ -137,20 +137,3 @@ updates:
       - 'type: task'
       - 'in: build'
 
-  - package-ecosystem: 7.0.x
-    target-branch: main
-    directory: /docs
-    schedule:
-      interval: weekly
-    labels:
-      - 'type: task'
-      - 'in: build'
-
-  - package-ecosystem: 6.5.x
-    target-branch: main
-    directory: /docs
-    schedule:
-      interval: weekly
-    labels:
-      - 'type: task'
-      - 'in: build'