OPENDJ-2111 GUI Removes matching rules type

Since matching rule sdk migration, we can not know the matching rule type.
This commit remove control panel code related to matching rule type.

* src/main/java/org/opends/guitools/controlpanel/ui/BrowseSchemaPanel.java
** Remove type filter for matching rules

* src/main/java/org/opends/guitools/controlpanel/ui/CustomAttributePanel.java
** Duplicate change done in r12433

* src/main/java/org/opends/guitools/controlpanel/ui/MatchingRulePanel.java
** Remove type information in matching rule panel

* src/main/java/org/opends/guitools/controlpanel/util/Utilities.java
** Remove methods to get type of matching rule