Cache based on Cargo.lock.

.github/workflows/rust.yml

@@ -29,18 +29,6 @@ jobs:
       - if: matrix.os == 'ubuntu-latest'
         run: sudo chown -R $(whoami):$(id -ng) ~/.cargo/
 
-      - name: Cache Cargo Registry
-        uses: actions/cache@v1
-        with:
-          path: ~/.cargo/registry
-          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.toml') }}
-
-      - name: Cache Cargo Build Target
-        uses: actions/cache@v1
-        with:
-          path: tokenizers/target
-          key: ${{ runner.os }}-cargo-build-${{ hashFiles('**/Cargo.toml') }}
-
       - name: Build
         uses: actions-rs/cargo@v1
         with: