fix setup.py dependency and move requirement under python/

python/setup.py.server.in

@@ -29,7 +29,7 @@ util.gen_pipeline_code("paddle_serving_server")
 
 REQUIRED_PACKAGES = [
     'six >= 1.10.0', 'protobuf >= 3.11.0', 'grpcio <= 1.33.2', 'grpcio-tools <= 1.33.2',
-    'paddle_serving_client', 'flask >= 1.1.1', 'paddle_serving_app', 'func_timeout', 'pyyaml'
+    'flask >= 1.1.1', 'func_timeout', 'pyyaml'
 ]
 
 packages=['paddle_serving_server',

python/setup.py.server_gpu.in

@@ -31,7 +31,7 @@ util.gen_pipeline_code("paddle_serving_server_gpu")
 
 REQUIRED_PACKAGES = [
     'six >= 1.10.0', 'protobuf >= 3.11.0', 'grpcio <= 1.33.2', 'grpcio-tools <= 1.33.2',
-    'paddle_serving_client', 'flask >= 1.1.1', 'paddle_serving_app', 'func_timeout', 'pyyaml'
+    'flask >= 1.1.1', 'func_timeout', 'pyyaml'
 ]
 
 packages=['paddle_serving_server_gpu',

requirements.txt

-sphinx==2.1.0
-mistune
-sphinx_rtd_theme
-paddlepaddle>=1.8.4
-shapely<=1.6.1