Bug 1608388 - reduce frequency of mingw* builds. r=bc

reduce frequency of mingw* builds.

Differential Revision: https://phabricator.services.mozilla.com/D73316

taskcluster/ci/build/windows-mingw.yml

@@ -12,6 +12,9 @@ job-defaults:
         actions: [build]
         script: mozharness/scripts/fx_desktop_build.py
         need-xvfb: false
+    optimization:
+        push-interval-10:
+            - windows
 
 win32-mingwclang/opt:
     description: "Win32 MinGW-Clang Opt"
@@ -32,7 +35,7 @@ win32-mingwclang/opt:
             - builds/releng_base_windows_32_mingw_builds.py
             - builds/releng_sub_windows_configs/32_mingwclang.py
         mozconfig-variant: mingwclang
-    run-on-projects: ['try', 'release']
+    run-on-projects: ['release']
     fetches:
         toolchain:
             - mingw32-rust
@@ -65,7 +68,7 @@ win32-mingwclang/debug:
             - builds/releng_base_windows_32_mingw_builds.py
             - builds/releng_sub_windows_configs/32_mingwclang.py
         mozconfig-variant: mingwclang-debug
-    run-on-projects: ['try', 'release']
+    run-on-projects: ['release']
     fetches:
         toolchain:
             - mingw32-rust
@@ -98,7 +101,7 @@ win64-mingwclang/opt:
             - builds/releng_base_windows_64_mingw_builds.py
             - builds/releng_sub_windows_configs/64_mingwclang.py
         mozconfig-variant: mingwclang
-    run-on-projects: ['try', 'release']
+    run-on-projects: ['release']
     fetches:
         toolchain:
             - mingw32-rust
@@ -131,7 +134,7 @@ win64-mingwclang/debug:
             - builds/releng_base_windows_64_mingw_builds.py
             - builds/releng_sub_windows_configs/64_mingwclang.py
         mozconfig-variant: mingwclang-debug
-    run-on-projects: ['try', 'release']
+    run-on-projects: ['release']
     fetches:
         toolchain:
             - mingw32-rust