remove xrdp dependency from travis build

.travis.centos.sh

@@ -4,7 +4,7 @@ SRC_DIR=${PWD}
 
 cd /tmp
 yum install -y epel-release
-yum install -y xrdp xrdp-devel xrdp-selinux wget sudo
+yum install -y wget sudo
 yum install -y pulseaudio pulseaudio-libs pulseaudio-libs-devel
 yum install -y rpmdevtools yum-utils
 yum-builddep -y pulseaudio

.travis.ubuntu.sh

@@ -6,7 +6,7 @@ cd /tmp
 sed -i.bak -e 's|^# deb-src|deb-src|' /etc/apt/sources.list
 
 apt update
-apt install -y build-essential dpkg-dev libpulse-dev pulseaudio pkg-config xrdp
+apt install -y build-essential dpkg-dev libpulse-dev pulseaudio pkg-config
 apt install -y g++ clang
 
 apt install -y pulseaudio