Remove 1.12 release schedule (#2744)

There is no need to maintain the release schedule in each branch, so
it's being removed from all branches aside from develop.

Also removes the badges that don't pertain to 1.12

2 files changed, 0 insertions, 34 deletions

diff --git a/doc/img/release-schedule.plantuml b/doc/img/release-schedule.plantuml
deleted file mode 100644
index c724dc9..0000000
--- a/doc/img/release-schedule.plantuml
+++ /dev/null
@@ -1,34 +0,0 @@
-The release timeline was generated on PlantUML (https://plantuml.com)
-
-The current script:
-
-@startgantt
-
-title HDF5 Release Schedule
-
-projectscale monthly
-Project starts 2022-01-01
-
-[1.8] starts 2022-01-01 and lasts 57 weeks
-[1.8.23] happens 2023-01-31
-[1.8] is colored in #F76969
-
-[1.10] starts 2022-01-01 and lasts 104 weeks
-[1.10.9] happens 2022-05-31
-[1.10.10] happens 2023-02-28
-[1.10.10] displays on same row as [1.10.9]
-[1.10] is colored in #F6DD60
-
-[1.12] starts 2022-01-01 and lasts 65 weeks
-[1.12.2] happens 2022-04-30
-[1.12.3] happens 2023-03-31
-[1.12.3] displays on same row as [1.12.2]
-[1.12] is colored in #88CCEE
-
-[1.14] starts at 2023-01-01 and lasts 52 weeks
-[1.14.0] happens at 2022-12-31
-[1.14.1] happens at 2023-04-30
-[1.14.1] displays on same row as [1.14.0]
-[1.14] is colored in #B187CF
-
-@endgantt
diff --git a/doc/img/release-schedule.png b/doc/img/release-schedule.png
deleted file mode 100755
index b96f741..0000000
--- a/doc/img/release-schedule.png
+++ /dev/null