MONGOCRYPT-779 drop support Visual Studio 2015 (#1013)

Author: kevinAlbs

.evergreen/config.yml

@@ -1190,15 +1190,6 @@ buildvariants:
   run_on: rhel83-zseries-small
   tasks:
   - build-and-test-and-upload
-- name: windows-vs2015-compile
-  display_name: "Windows VS 2015 compile"
-  run_on: windows-64-vs2015-test
-  expansions:
-    vs_version: "14"
-    vs_target_arch: amd64
-  tasks:
-  - build-and-test-and-upload
-  - build-and-test-shared-bson
 - name: windows-test
   display_name: "Windows 2016"
   run_on: windows-64-vs2017-test

CHANGELOG.md

@@ -1,4 +1,8 @@
 # ChangeLog
+## 1.15.0 (Unreleased)
+### Removed
+- Support for building with Visual Studio 2015. Use Visual Studio 2017 or newer.
+
 ## 1.14.0
 ### Fixed
 - Fix building against libbson with extra alignment enabled (`ENABLE_EXTRA_ALIGNMENT=ON`).