Revert "Attempt to fix rhbz#2186996 rhbz#2221433 rhbz#2245705"

This reverts commit de84778.

I made a mistake and the rules were not valid:
| Compiling targeted mysql module
| mysql.te:80:ERROR 'unknown type sysctl_net_t' at token ';' on line 5659:
| allow mysqld_t proc_net_t:file { read getattr open };
| allow mysqld_t sysctl_net_t:dir search;
| /usr/bin/checkmodule:  error(s) encountered while parsing configuration

Reverting until I find a way to implement the rules correctly

mysql.te

@@ -76,10 +76,6 @@ allow mysqld_t self:unix_stream_socket create_stream_socket_perms;
 allow mysqld_t self:tcp_socket create_stream_socket_perms;
 allow mysqld_t self:udp_socket create_socket_perms;
 
-allow mysqld_t proc_net_t:file { read getattr open };
-allow mysqld_t sysctl_net_t:dir search;
-allow mysqld_t sysctl_net_t:file { read getattr open };
-
 manage_dirs_pattern(mysqld_t, mysqld_db_t, mysqld_db_t)
 manage_files_pattern(mysqld_t, mysqld_db_t, mysqld_db_t)
 manage_sock_files_pattern(mysqld_t, mysqld_db_t, mysqld_db_t)