Remove redundant commands in build.sh and build_doc.sh

paddle/scripts/docker/build.sh

@@ -125,8 +125,7 @@ EOF
             -DWITH_AVX=${WITH_AVX:-ON} \
             -DWITH_SWIG_PY=ON \
             -DWITH_STYLE_CHECK=OFF
-        make -j `nproc` gen_proto_py framework_py_proto
+
-        make -j `nproc` copy_paddle_pybind
         make -j `nproc` paddle_docs paddle_apis
         popd
     fi

paddle/scripts/travis/build_doc.sh

@@ -7,8 +7,7 @@ cd $TRAVIS_BUILD_DIR/build
 
 # Compile Documentation only.
 cmake .. -DCMAKE_BUILD_TYPE=Release -DWITH_GPU=OFF -DWITH_MKL=OFF -DWITH_DOC=ON -DWITH_STYLE_CHECK=OFF
-make -j `nproc` gen_proto_py framework_py_proto
+
-make -j `nproc` copy_paddle_pybind
 make -j `nproc` paddle_docs paddle_apis
 
 # check websites for broken links