CI: don't install binutils

I think this was added for "strip.exe", but that should be used from the
active toolchain in PATH now.

It's not there in autobuild as well.

.github/workflows/main.yml

@@ -44,7 +44,7 @@ jobs:
       - uses: msys2/setup-msys2@v2
         with:
           msystem: ${{ contains(matrix.msystem, 'ARM64') && 'MSYS' || matrix.msystem }}
-          install: VCS base-devel binutils pactoys ${{ matrix.toolchain }}
+          install: VCS base-devel pactoys ${{ matrix.toolchain }}
           update: true
           release: ${{ runner.arch != 'ARM64' }}
           location: 'D:\M'