remove erronously configured codecov flags

Author: jakkdl

.github/workflows/ci.yml

@@ -87,7 +87,6 @@ jobs:
           directory: empty
           token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
           name: Windows (${{ matrix.python }}, ${{ matrix.arch }}${{ matrix.extra_name }})
-          flags: Windows,${{ matrix.python }}
 
   Ubuntu:
     name: 'Ubuntu (${{ matrix.python }}${{ matrix.extra_name }})'
@@ -137,7 +136,6 @@ jobs:
           directory: empty
           token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
           name: Ubuntu (${{ matrix.python }}${{ matrix.extra_name }})
-          flags: Ubuntu,${{ matrix.python }}
 
   macOS:
     name: 'macOS (${{ matrix.python }})'
@@ -173,7 +171,6 @@ jobs:
           directory: empty
           token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
           name: macOS (${{ matrix.python }})
-          flags: macOS,${{ matrix.python }}
 
   # run CI on a musl linux
   Alpine:
@@ -199,7 +196,6 @@ jobs:
           directory: empty
           token: 87cefb17-c44b-4f2f-8b30-1fff5769ce46
           name: Alpine
-          flags: Alpine,3.12
 
   Cython:
     name: "Cython"