Remove any existing gvm

src/freedombone

@@ -6370,6 +6370,9 @@ function upgrade_golang {
 	if [ -d /root/.gvm ]; then
 		rm -rf /root/.gvm
 	fi
+	if [ -d $GVM_ROOT ]; then
+		rm -rf $GVM_ROOT
+	fi
 	sed -i "s|export GVM_ROOT=.*|export GVM_ROOT=$GVM_ROOT|g" ~/.bashrc
 
 	if [ ! -d /home/git ]; then