diff --git a/ruma-serde/.builds/beta.yml b/ruma-serde/.builds/beta.yml
deleted file mode 100644
index e81bd85b..00000000
--- a/ruma-serde/.builds/beta.yml
+++ /dev/null
@@ -1,27 +0,0 @@
-image: archlinux
-packages:
-  - rustup
-sources:
-  - https://github.com/ruma/ruma-serde
-tasks:
-  - rustup: |
-      # We specify --profile minimal because we'd otherwise download docs
-      rustup toolchain install beta --profile minimal -c rustfmt -c clippy
-      rustup default beta
-  - test: |
-      cd ruma-serde
-
-      # We don't want the build to stop on individual failure of independent
-      # tools, so capture tool exit codes and set the task exit code manually
-      set +e
-
-      cargo fmt -- --check
-      fmt_exit=$?
-
-      cargo clippy --all-targets --all-features -- -D warnings
-      clippy_exit=$?
-
-      cargo test --all-features --verbose
-      test_exit=$?
-
-      exit $(( $fmt_exit || $clippy_exit || $test_exit ))
diff --git a/ruma-serde/.builds/msrv.yml b/ruma-serde/.builds/msrv.yml
deleted file mode 100644
index a6ea11f0..00000000
--- a/ruma-serde/.builds/msrv.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-image: archlinux
-packages:
-  - rustup
-sources:
-  - https://github.com/ruma/ruma-serde
-tasks:
-  - rustup: |
-      # We specify --profile minimal because we'd otherwise download docs
-      rustup toolchain install 1.36.0 --profile minimal
-      rustup default 1.36.0
-  - test: |
-      cd ruma-serde
-
-      cargo build --verbose
diff --git a/ruma-serde/.builds/nightly.yml b/ruma-serde/.builds/nightly.yml
deleted file mode 100644
index cd9c0de1..00000000
--- a/ruma-serde/.builds/nightly.yml
+++ /dev/null
@@ -1,32 +0,0 @@
-image: archlinux
-packages:
-  - rustup
-sources:
-  - https://github.com/ruma/ruma-serde
-tasks:
-  - rustup: |
-      rustup toolchain install nightly --profile minimal
-      rustup default nightly
-
-      # Try installing rustfmt & clippy for nightly, but don't fail the build
-      # if they are not available
-      rustup component add rustfmt || true
-      rustup component add clippy || true
-  - test: |
-      cd ruma-serde
-
-      # We don't want the build to stop on individual failure of independent
-      # tools, so capture tool exit codes and set the task exit code manually
-      set +e
-
-      if ( rustup component list | grep -q rustfmt ); then
-        cargo fmt -- --check
-      fi
-      fmt_exit=$?
-
-      if ( rustup component list | grep -q clippy ); then
-        cargo clippy --all-targets --all-features -- -D warnings
-      fi
-      clippy_exit=$?
-
-      exit $(( $fmt_exit || $clippy_exit ))
diff --git a/ruma-serde/.builds/stable.yml b/ruma-serde/.builds/stable.yml
deleted file mode 100644
index 0424b9f5..00000000
--- a/ruma-serde/.builds/stable.yml
+++ /dev/null
@@ -1,29 +0,0 @@
-image: archlinux
-packages:
-  - rustup
-sources:
-  - https://github.com/ruma/ruma-serde
-tasks:
-  - rustup: |
-      # We specify --profile minimal because we'd otherwise download docs
-      rustup toolchain install stable --profile minimal -c rustfmt -c clippy
-      rustup default stable
-  - test: |
-      cd ruma-serde
-
-      # We don't want the build to stop on individual failure of independent
-      # tools, so capture tool exit codes and set the task exit code manually
-      set +e
-
-      cargo fmt -- --check
-      fmt_exit=$?
-
-      cargo clippy --all-targets --all-features -- -D warnings
-      clippy_exit=$?
-
-      cargo test --verbose
-      test_exit=$?
-
-      exit $(( $fmt_exit || $clippy_exit || $test_exit ))
-  # TODO: Add audit task once cargo-audit binary releases are available.
-  #       See https://github.com/RustSec/cargo-audit/issues/66