Require explicit license for PY23_TEST inside contrib/

build/conf/python.conf

@@ -1036,7 +1036,6 @@ multimodule PY23_TEST {
     module PY3TEST_LIBRARY: PY3_LIBRARY {
         .RESTRICTED=RUN_ANTLR4_PYTHON
         PEERDIR+=library/python/pytest
-        _REQUIRE_EXPLICIT_LICENSE()
         RUN_CYTHON_SCRIPT_H=$YMAKE_PYTHON $CYTHON_SCRIPT
     }
 }