Remove duplicated step from CI workflow (#2289)

.github/workflows/ci.yml

@@ -44,17 +44,11 @@ jobs:
           profile: minimal
           override: true
 
-      - name: Install ${{ matrix.version }}
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: ${{ matrix.version }}-${{ matrix.target.triple }}
-          profile: minimal
-          override: true
-
       - name: Generate Cargo.lock
         uses: actions-rs/cargo@v1
         with:
           command: generate-lockfile
+
       - name: Cache Dependencies
         uses: Swatinem/rust-cache@v1.2.0
 
@@ -102,6 +96,7 @@ jobs:
         run: |
           cargo install cargo-tarpaulin --vers "^0.13"
           cargo tarpaulin --out Xml --verbose
+
       - name: Upload to Codecov
         if: >
           matrix.target.os == 'ubuntu-latest'