Unroll import-team in CODEOWNERS (#13118)

Author: brettcannon

.github/CODEOWNERS

@@ -26,8 +26,8 @@ Objects/dict*                 @methane
 # Ignoring importlib.h so as to not get flagged on
 # all pull requests that change the emitted
 # bytecode.
-**/*import*.c                 @python/import-team
-**/*import*.py                @python/import-team
+**/*import*.c                 @brettcannon @encukou @ericsnowcurrently @ncoghlan @warsaw
+**/*import*.py                @brettcannon @encukou @ericsnowcurrently @ncoghlan @warsaw
 
 
 # SSL