ci: Remove clippy check.

While useful sometimes, it doesn't have stability guarantees (so CI can
break when new rust stable versions are released), and it can do
suggestions that make us require newer rustc versions than needed, which
is not ideal.

.github/workflows/cbindgen.yml

@@ -9,7 +9,7 @@ on:
       - master
 
 jobs:
-  rustfmt-clippy:
+  rustfmt:
 
     runs-on: ubuntu-latest
 
@@ -22,7 +22,7 @@ jobs:
         profile: minimal
         toolchain: stable
         override: true
-        components: clippy, rustfmt
+        components: rustfmt
 
     - name: Run rustfmt
       uses: actions-rs/cargo@v1
@@ -30,12 +30,6 @@ jobs:
         command: fmt
         args: -- --check
 
-    - name: Run clippy
-      uses: actions-rs/clippy-check@v1
-      with:
-        token: ${{ secrets.GITHUB_TOKEN }}
-        args: --workspace -- -D warnings
-
   build:
 
     runs-on: ubuntu-latest