diff --git a/ci/docker/Dockerfile.build.ubuntu_gpu_cu100 b/ci/docker/Dockerfile.build.ubuntu_gpu_cu100
index c9158725a773..c9908a5eda4e 100644
--- a/ci/docker/Dockerfile.build.ubuntu_gpu_cu100
+++ b/ci/docker/Dockerfile.build.ubuntu_gpu_cu100
@@ -77,12 +77,9 @@ ARG GROUP_ID=0
 COPY install/ubuntu_adduser.sh /work/
 RUN /work/ubuntu_adduser.sh
 
-<<<<<<< HEAD
-=======
 ENV CUDNN_VERSION=7.5.1.10
 COPY install/ubuntu_cudnn.sh /work/
 RUN /work/ubuntu_cudnn.sh
->>>>>>> remove the duplicate one
 
 COPY runtime_functions.sh /work/
 
diff --git a/ci/docker/Dockerfile.build.ubuntu_gpu_cu90 b/ci/docker/Dockerfile.build.ubuntu_gpu_cu90
index 2911776f6484..16e8d998393a 100644
--- a/ci/docker/Dockerfile.build.ubuntu_gpu_cu90
+++ b/ci/docker/Dockerfile.build.ubuntu_gpu_cu90
@@ -77,13 +77,10 @@ ARG GROUP_ID=0
 COPY install/ubuntu_adduser.sh /work/
 RUN /work/ubuntu_adduser.sh
 
-<<<<<<< HEAD
-=======
 ENV CUDNN_VERSION=7.5.1.10
 COPY install/ubuntu_cudnn.sh /work/
 RUN /work/ubuntu_cudnn.sh
 
->>>>>>> remove the duplicate one
 COPY runtime_functions.sh /work/
 
 WORKDIR /work/mxnet
diff --git a/ci/docker/Dockerfile.build.ubuntu_gpu_cu92 b/ci/docker/Dockerfile.build.ubuntu_gpu_cu92
index edbe040669ea..1618e68693e7 100644
--- a/ci/docker/Dockerfile.build.ubuntu_gpu_cu92
+++ b/ci/docker/Dockerfile.build.ubuntu_gpu_cu92
@@ -76,13 +76,10 @@ ARG GROUP_ID=0
 COPY install/ubuntu_adduser.sh /work/
 RUN /work/ubuntu_adduser.sh
 
-<<<<<<< HEAD
-=======
 ENV CUDNN_VERSION=7.5.1.10
 COPY install/ubuntu_cudnn.sh /work/
 RUN /work/ubuntu_cudnn.sh
 
->>>>>>> remove the duplicate one
 COPY runtime_functions.sh /work/
 
 WORKDIR /work/mxnet