Remove 1.10 release schedule (#2745)

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

3 files changed, 0 insertions, 63 deletions

diff --git a/README.md b/README.md
index e2436af..5f8d552 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,7 @@ HDF5 version 1.10.11-1 currently under development
 
 ![HDF5 Logo](doxygen/img/HDF5.png)
 
-[![develop build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=develop&label=develop)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Adevelop)
-[![1.14 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_14&label=1.14)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_14)
-[![1.12 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_12&label=1.12)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_12)
 [![1.10 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_10&label=1.10)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_10)
-[![1.8 build status](https://img.shields.io/github/actions/workflow/status/HDFGroup/hdf5/main.yml?branch=hdf5_1_8&label=1.8)](https://github.com/HDFGroup/hdf5/actions?query=branch%3Ahdf5_1_8)
 [![BSD](https://img.shields.io/badge/License-BSD-blue.svg)](https://github.com/HDFGroup/hdf5/blob/develop/COPYING)
 
 *Please refer to the release_docs/INSTALL file for installation instructions.*
@@ -75,31 +71,6 @@ use and configuration
     https://forum.hdfgroup.org/t/quickstart-guide-welcome-to-the-new-hdf-forum
 
 
-RELEASE SCHEDULE
-----------------
-
-![HDF5 release schedule](doc/img/release-schedule.png) 
-
-HDF5 does not release on a regular schedule. Instead, releases are driven by
-new features and bug fixes, though we try to have at least one release of each
-maintenance branch per year. Future HDF5 releases indicated on this schedule
-are tentative.
-
-**NOTE**: HDF5 1.12 is being retired early due to its incomplete and incompatible VOL
-layer.
-
-| Release | New Features |
-| ------- | ------------ |
-| 1.8.23 | last HDF5 1.8 release |
-| 1.10.10 | CVE fixes, performance improvements, H5Dchunk\_iter() |
-| 1.12.3 | CVE fixes, performance improvements, H5Dchunk\_iter(), last HDF5 1.12 release |
-| 1.14.1 | selection I/O with datatype conversion |
-| 2.0.0 | TBD |
-| TBD | VFD SWMR |
-
-This list of feature release versions is also tentative, and the specific release
-in which a feature is introduced may change.
-
 
 SNAPSHOTS, PREVIOUS RELEASES AND SOURCE CODE
 --------------------------------------------
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