Remove nonexistent group from Dockerfile

This yum group does not exist on RHEL 7 nor 8.  While RHEL 7's yum just
ignores it, RHEL 8's dnf raises an error.

Author: yselkowitz

Dockerfile

@@ -2,7 +2,7 @@ FROM openshift/origin-release:golang-1.14 as builder
 
 RUN yum update -y && \
     yum install -y make git sqlite glibc-static openssl-static zlib-static && \
-    yum groupinstall -y "Development Tools" "Development Libraries"
+    yum groupinstall -y "Development Tools"
 
 ENV GOPATH /go
 ENV PATH $GOPATH/bin:/usr/local/go/bin:$PATH