Remove WASM pack install step from CI (already included as dev dep)

Author: soerenbf

.github/workflows/pipeline.yml

@@ -94,11 +94,6 @@ jobs:
                       deps/concordium-base/rust-src
                       deps/concordium-base/concordium-contracts-common
 
-            - name: Get wasm-pack
-              uses: jetli/[email protected]
-              with:
-                  version: 'latest'
-
             - name: Build
               run: yarn build