ci: delete some temporary ci steps

CI had some temporary steps left over from the yarn
to pnpm migration. Now that both yarn and pnpm are
built into ci-builder, we do not need to install
them manually as part of CI. There are some "todo remove this"
comments left over but they may be erroneous because
they are in CI jobs that do not use `ci-builder`.
Will leave those to a future PR.

.circleci/config.yml

@@ -115,19 +115,6 @@ jobs:
           name: Restore PNPM Package Cache
           keys:
             - pnpm-packages-v2-{{ checksum "pnpm-lock.yaml" }}
-      # TODO remove me after ci builder updated
-      - run:
-          name: Install pnpm package manager
-          command: |
-            npm i pnpm --global
-      # TODO remove me after ci builder updated
-      # A github dep clones-with-immutable-args is installed via github
-      # packages installed via npm via github automatically run postpack scripts
-      # their postpack script happens to use yarn so we need it here
-      - run:
-          name: Install yarn package manager
-          command: |
-            npm i yarn@1 --global
       - run:
           name: Install dependencies
           command: pnpm install --frozen-lockfile
@@ -498,19 +485,6 @@ jobs:
       - attach_workspace: { at: "." }
       - check-changed:
           patterns: contracts-bedrock
-      # TODO remove me after ci builder updated
-      - run:
-          name: Install pnpm package manager
-          command: |
-            npm i pnpm --global
-      # TODO remove me after ci builder updated
-      # A github dep clones-with-immutable-args is installed via github
-      # packages installed via npm via github automatically run postpack scripts
-      # their postpack script happens to use yarn so we need it here
-      - run:
-          name: Install yarn package manager
-          command: |
-            npm i yarn@1 --global
       - run:
           name: Compile with metadata hash
           command: pnpm clean && pnpm build:with-metadata
@@ -561,19 +535,6 @@ jobs:
             - pnpm-packages-v2-{{ checksum "pnpm-lock.yaml" }}
       - check-changed:
           patterns: contracts-bedrock,op-bindings
-      # TODO remove me after ci builder updated
-      - run:
-          name: Install pnpm package manager
-          command: |
-            npm i pnpm --global
-      # TODO remove me after ci builder updated
-      # A github dep clones-with-immutable-args is installed via github
-      # packages installed via npm via github automatically run postpack scripts
-      # their postpack script happens to use yarn so we need it here
-      - run:
-          name: Install yarn package manager
-          command: |
-            npm i yarn@1 --global
       - run:
           name: check go bindings
           command: make && git diff --exit-code
@@ -603,19 +564,6 @@ jobs:
             - pnpm-packages-v2-{{ checksum "pnpm-lock.yaml" }}
       - check-changed:
           patterns: <<parameters.package_name>>,<<parameters.dependencies>>
-      # TODO remove me after ci builder updated
-      - run:
-          name: Install pnpm package manager
-          command: |
-            npm i pnpm --global
-      # TODO remove me after ci builder updated
-      # A github dep clones-with-immutable-args is installed via github
-      # packages installed via npm via github automatically run postpack scripts
-      # their postpack script happens to use yarn so we need it here
-      - run:
-          name: Install yarn package manager
-          command: |
-            npm i yarn@1 --global
       - run:
           name: Lint
           command: pnpm lint && git diff --exit-code
@@ -801,21 +749,6 @@ jobs:
             - pnpm-packages-v2-{{ checksum "pnpm-lock.yaml" }}
       - check-changed:
           patterns: packages
-      # TODO remove me after ci builder updated
-      - run:
-          name: Install pnpm package manager
-          command: |
-            npm i pnpm --global
-      # TODO remove me after ci builder updated
-      # A github dep clones-with-immutable-args is installed via github
-      # packages installed via npm via github automatically run postpack scripts
-      # their postpack script happens to use yarn so we need it here
-      - run:
-          name: Install yarn package manager
-          command: |
-            npm i yarn@1 --global
-      # Note: The below needs to be manually configured whenever we
-      # add a new package to CI.
       - run:
           name: Check common-ts
           command: npx depcheck