Core: Remove unused Id::registerId

This was intended to avoid the char * -> int mapping at all, but
was never actively used.

Change-Id: Ief119cc2ff2c8b4ed404c9eb534e17265a3562e6
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/coreplugin/id.cpp

@@ -296,22 +296,6 @@ Id Id::withPrefix(const char *prefix) const
 }
 
 
-/*!
-  Associates a id with its uid and its string
-  representation.
-
-  The uid should be taken from the plugin's private range.
-
-  \sa fromSetting()
-*/
-
-void Id::registerId(int uid, const char *name)
-{
-    StringHolder sh(name, 0);
-    idFromString[sh] = uid;
-    stringFromId[uid] = sh;
-}
-
 bool Id::operator==(const char *name) const
 {
     const char *string = stringFromId.value(m_id).str;

src/plugins/coreplugin/id.h

@@ -74,7 +74,6 @@ public:
     static Id fromString(const QString &str); // FIXME: avoid.
     static Id fromName(const QByteArray &ba); // FIXME: avoid.
     static Id fromSetting(const QVariant &variant); // Good to use.
-    static void registerId(int uid, const char *name);
 
 private:
     // Intentionally unimplemented