remove precision_test=off (#43843)

paddle/scripts/paddle_build.bat

@@ -81,7 +81,6 @@ if not defined BUILD_DIR set BUILD_DIR=build
 if not defined NEW_RELEASE_ALL set NEW_RELEASE_ALL=ON
 if not defined NEW_RELEASE_PYPI set NEW_RELEASE_PYPI=OFF
 if not defined NEW_RELEASE_JIT set NEW_RELEASE_JIT=OFF
-set PRECISION_TEST=OFF
 
 set task_name=%1
 set UPLOAD_TP_FILE=OFF

paddle/scripts/paddle_build.sh

@@ -270,7 +270,6 @@ EOF
     # docker environment is fully controlled by this script.
     # See /Paddle/CMakeLists.txt, UNITTEST_USE_VIRTUALENV option.
     set +e
-    PRECISION_TEST=OFF
     cmake .. \
         -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE:-Release} \
         ${PYTHON_FLAGS} \