[2025-LDN] Add new sponsors and clean up unused sponsor tiers (#15484)

* [2025-LDN] Add new sponsors and clean up unused sponsor tiers

- LaunchDarkly, Incident.io and Puppet are sponsoring us at the Standard
  level.
- Hannah's venture AI for the Rest of Us has funded the live
  captioning and BSL interpretation.

* incidentio: Use their dark wordmark logo

Author: issyl0

assets/sponsors/i/incidentio.png

@@ -128,6 +128,15 @@ sponsors:
     level: standard
   - id: dynatrace
     level: standard
+  - id: incidentio
+    level: standard
+  - id: launch-darkly
+    level: standard
+  - id: puppet-by-perforce
+    level: standard
+  # Accessibility sponsors
+  - id: ai4ru
+    level: accessibility
   # Logo sponsors
   - id: that-agile
     level: logo
@@ -158,18 +167,9 @@ sponsor_levels:
   - id: standard
     label: Standard
     max: 14
-  - id: evening
-    label: Evening
-    max: 2
   - id: accessibility
     label: Accessibility
     max: 1
-  - id: childcare
-    label: Childcare
-    max: 1
-  - id: Outreach
-    label: Outreach
-    max: 3
   - id: logo
     label: Logo
     max: 20
@@ -269,12 +269,6 @@ program:
     start_time: "17:00"
     end_time: "18:10"
 
-  # - title: "Evening event at local venue, announced during Keynote"
-  #   type: custom
-  #   date: 2025-09-23T00:00:00+01:00
-  #   start_time: "18:30"
-  #   end_time: "Onwards"
-
   # Day two
   - title: "Registration & Coffee"
     type: custom

data/events/2025/london/main.yml

@@ -0,0 +1,2 @@
+name: "incidentio"
+url: "https://incident.io/"