centos now installs cmake from conda (#48035)

Summary:
For the same reason that ubuntu builds need conda cmake to find mkl.

CC jaglinux

Pull Request resolved: #48035

Reviewed By: zhangguanheng66

Differential Revision: D25246723

Pulled By: malfet

fbshipit-source-id: 9dac130eecd2f76764d8027b888404c87e7a954a

.jenkins/pytorch/common.sh

@@ -129,13 +129,18 @@ fi
 if [[ "$BUILD_ENVIRONMENT" == *pytorch-xla-linux-bionic* ]] || \
    [[ "$BUILD_ENVIRONMENT" == *pytorch-linux-xenial-cuda9-cudnn7-py2* ]] || \
    [[ "$BUILD_ENVIRONMENT" == *pytorch-linux-xenial-cuda10.1-cudnn7-py3* ]] || \
+   [[ "$BUILD_ENVIRONMENT" == *pytorch-*centos* ]] || \
    [[ "$BUILD_ENVIRONMENT" == *pytorch-linux-bionic* ]]; then
   if ! which conda; then
     echo "Expected ${BUILD_ENVIRONMENT} to use conda, but 'which conda' returns empty"
     exit 1
   else
     conda install -q -y cmake
   fi
+  if [[ "$BUILD_ENVIRONMENT" == *pytorch-*centos* ]]; then
+    # cmake3 package will conflict with conda cmake
+    sudo yum -y remove cmake3 || true
+  fi
 fi
 
 retry () {