fix(coprocessor): remove redundant npm install in GPU workflows (#1869)

* fix(ci): remove redundant npm install in GPU workflows

`npm ci` already installs all dependencies from the lockfile.
The subsequent `npm install` does nothing useful but wastes ~2-3 minutes
checking dependencies on each workflow run.

* trigger CI

Author: enitrat

.github/workflows/coprocessor-benchmark-gpu.yml

@@ -232,7 +232,7 @@ jobs:
         run: |
           cp ./host-contracts/.env.example ./host-contracts/.env
           npm --workspace=host-contracts ci --include=optional
-          cd host-contracts && npm install && npm run deploy:emptyProxies && npx hardhat compile
+          cd host-contracts && npm run deploy:emptyProxies && npx hardhat compile
 
       - name: Run benchmarks on GPU
         run: |

.github/workflows/coprocessor-gpu-tests.yml

@@ -181,7 +181,7 @@ jobs:
 
       - run: cp ./host-contracts/.env.example ./host-contracts/.env
       - run: npm --workspace=host-contracts ci --include=optional
-      - run: "cd host-contracts && npm install && npm run deploy:emptyProxies && npx hardhat compile"
+      - run: "cd host-contracts && npm run deploy:emptyProxies && npx hardhat compile"
         env:
           HARDHAT_NETWORK: hardhat