ci+docs: CentOS renamed the PowerTools repo to lowercase

Change-Id: I4b78986f3af17d2124824992e31b408ebe8de03a
diff --git a/.jenkins.d/00-deps.sh b/.jenkins.d/00-deps.sh
index 67ac9ae..0e81bf9 100755
--- a/.jenkins.d/00-deps.sh
+++ b/.jenkins.d/00-deps.sh
@@ -34,7 +34,7 @@
     fi
 
 elif has CentOS-8 $NODE_LABELS; then
-    sudo dnf config-manager --enable PowerTools
+    sudo dnf config-manager --enable powertools
     sudo dnf -y install gcc-c++ libasan pkgconf-pkg-config python3 \
                         boost-devel openssl-devel sqlite-devel \
                         libpcap-devel systemd-devel
diff --git a/docs/INSTALL.rst b/docs/INSTALL.rst
index d555476..a326ff3 100644
--- a/docs/INSTALL.rst
+++ b/docs/INSTALL.rst
@@ -107,7 +107,7 @@
 
   .. code-block:: sh
 
-    sudo dnf config-manager --enable PowerTools  # on CentOS only
+    sudo dnf config-manager --enable powertools  # on CentOS only
     sudo dnf install libpcap-devel systemd-devel
 
 Build
diff --git a/tests/other/cs-benchmark.cpp b/tests/other/cs-benchmark.cpp
index eae79be..e6948ed 100644
--- a/tests/other/cs-benchmark.cpp
+++ b/tests/other/cs-benchmark.cpp
@@ -26,8 +26,6 @@
 #include "benchmark-helpers.hpp"
 #include "table/cs.hpp"
 
-#include <ndn-cxx/security/signature-sha256-with-rsa.hpp>
-
 #include <iostream>
 
 #ifdef HAVE_VALGRIND