Update setup.py to remove duplicate numpy entry (#5924)

Author: armando-fandango

ml-agents-envs/setup.py

@@ -51,7 +51,6 @@ def run(self):
     install_requires=[
         "cloudpickle",
         "grpcio>=1.11.0",
-        "numpy>=1.14.1",
         "Pillow>=4.2.1",
         "protobuf>=3.6,<3.20",
         "pyyaml>=3.1.0",