Remove unneeded priority settings

Neither of these Sysctl::Parameters resources needs to have a priority
specified. 60 is the default, and anything less than that falls within the
range Ubuntu reserves for packaged sysctl params. (Per README of procps
package: "end-users can use 60-*.conf and above")

Change-Id: I01ca4785592ddd098bae43ee333d0efbd3925ca2
Merge "Remove unneeded priority settings" into production