remove legacy USE_EIGEN_FOR_BLAS option

CMakeLists.txt

@@ -66,7 +66,6 @@ option(WITH_GOLANG      "Compile PaddlePaddle with GOLANG"              OFF)
 option(GLIDE_INSTALL    "Download and install go dependencies "         ON)
 option(WITH_DISTRIBUTE  "Compile with distributed support"              OFF)
 option(WITH_PSLIB       "Compile with pslib support"                    OFF)
-option(USE_EIGEN_FOR_BLAS   "Use matrix multiplication in Eigen"        OFF)
 option(EIGEN_USE_THREADS "Compile with multi-threaded Eigen"            OFF)
 option(WITH_ARM_FP16    "Use half precision support on armv8.2-a cpu"   OFF)
 option(WITH_CONTRIB     "Compile the third-party contributation"        OFF)

cmake/configure.cmake

@@ -33,10 +33,6 @@ if(NOT WITH_TIMER)
     add_definitions(-DPADDLE_DISABLE_TIMER)
 endif(NOT WITH_TIMER)
 
-if(USE_EIGEN_FOR_BLAS)
-    add_definitions(-DPADDLE_USE_EIGEN_FOR_BLAS)
-endif(USE_EIGEN_FOR_BLAS)
-
 if(EIGEN_USE_THREADS)
     add_definitions(-DEIGEN_USE_THREADS)
 endif(EIGEN_USE_THREADS)

cmake/external/openblas.cmake

@@ -11,11 +11,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-
-IF(USE_EIGEN_FOR_BLAS)
-    return()
-ENDIF(USE_EIGEN_FOR_BLAS)
-
 INCLUDE(cblas)
 
 IF(NOT ${CBLAS_FOUND})