diff --git a/taskcluster/ci/build/linux.yml b/taskcluster/ci/build/linux.yml
index b20e1643282a..c74adf9ef935 100644
--- a/taskcluster/ci/build/linux.yml
+++ b/taskcluster/ci/build/linux.yml
@@ -1218,47 +1218,6 @@ linux-gcp/opt:
         - linux64-nasm
         - linux64-node
 
-linux-gcp-shippable/opt:
-    description: "Linux32 Shippable - built on GCP"
-    attributes:
-        shippable: true
-        enable-full-crashsymbols: true
-    shipping-phase: build
-    shipping-product: firefox
-    index:
-        product: firefox
-        job-name: linux-gcp-opt
-        type: shippable
-    treeherder:
-        platform: linux32-shippable/opt
-        symbol: Bg
-        tier: 3
-    worker-type: gce/gecko-{level}-b-linux
-    worker:
-        docker-image: {in-tree: debian7-i386-build}
-        max-run-time: 7200
-        env:
-            PERFHERDER_EXTRA_OPTIONS: gcp
-    run:
-        using: mozharness
-        actions: [get-secrets, build, check-test]
-        config:
-            - builds/releng_base_firefox.py
-            - builds/releng_base_linux_32_builds.py
-            - taskcluster_nightly.py
-        script: "mozharness/scripts/fx_desktop_build.py"
-        secrets: true
-        tooltool-downloads: public
-        need-xvfb: true
-    toolchains:
-        - linux64-binutils
-        - linux64-clang
-        - linux64-rust
-        - linux64-rust-size
-        - linux64-cbindgen
-        - linux64-nasm
-        - linux64-node
-
 linux64-gcp/debug:
     description: "Linux64 Debug - built on GCP"
     index:
@@ -1333,43 +1292,3 @@ linux64-gcp/opt:
         - linux64-sccache
         - linux64-nasm
         - linux64-node
-
-linux64-gcp-shippable/opt:
-    description: "Linux64 Shippable - built on GCP"
-    attributes:
-        shippable: true
-        enable-full-crashsymbols: true
-    shipping-phase: build
-    shipping-product: firefox
-    index:
-        product: firefox
-        job-name: linux64-gcp-opt
-        type: shippable
-    treeherder:
-        platform: linux64-shippable/opt
-        symbol: Bg
-        tier: 3
-    worker-type: gce/gecko-{level}-b-linux
-    worker:
-        max-run-time: 7200
-        env:
-            PERFHERDER_EXTRA_OPTIONS: gcp
-    run:
-        using: mozharness
-        actions: [get-secrets, build, check-test]
-        config:
-            - builds/releng_base_firefox.py
-            - builds/releng_base_linux_64_builds.py
-            - taskcluster_nightly.py
-        script: "mozharness/scripts/fx_desktop_build.py"
-        secrets: true
-        tooltool-downloads: public
-        need-xvfb: true
-    toolchains:
-        - linux64-binutils
-        - linux64-clang
-        - linux64-rust
-        - linux64-rust-size
-        - linux64-cbindgen
-        - linux64-nasm
-        - linux64-node
diff --git a/taskcluster/ci/build/macosx.yml b/taskcluster/ci/build/macosx.yml
index e94a42f89561..89593476ba06 100644
--- a/taskcluster/ci/build/macosx.yml
+++ b/taskcluster/ci/build/macosx.yml
@@ -456,47 +456,3 @@ macosx64-gcp/opt:
         - linux64-sccache
         - linux64-nasm
         - linux64-node
-
-macosx64-gcp-shippable/opt:
-    description: "MacOS X x64 Cross-compile - built on GCP"
-    attributes:
-        shippable: true
-        enable-full-crashsymbols: true
-    shipping-phase: build
-    shipping-product: firefox
-    index:
-        product: firefox
-        job-name: macosx64-gcp-opt
-        type: shippable
-    treeherder:
-        platform: osx-shippable/opt
-        symbol: Bg
-        tier: 3
-    worker-type: gce/gecko-{level}-b-linux
-    worker:
-        max-run-time: 7200
-        env:
-            TOOLTOOL_MANIFEST: "browser/config/tooltool-manifests/macosx64/cross-releng.manifest"
-            PERFHERDER_EXTRA_OPTIONS: gcp
-    run:
-        using: mozharness
-        actions: [get-secrets, build]
-        config:
-            - builds/releng_base_firefox.py
-            - builds/releng_base_mac_64_cross_builds.py
-            - taskcluster_nightly.py
-        script: "mozharness/scripts/fx_desktop_build.py"
-        secrets: true
-        tooltool-downloads: internal
-    toolchains:
-        - linux64-binutils
-        - linux64-cctools-port
-        - linux64-clang
-        - linux64-hfsplus
-        - linux64-libdmg
-        - linux64-llvm-dsymutil
-        - linux64-rust-macos
-        - linux64-rust-size
-        - linux64-cbindgen
-        - linux64-nasm
-        - linux64-node