Do not export symbol virStateActive anymore

Commit 79b8a569 removes virStateActive, however it forgot to
remove the symbol together. Pushed under build-breaker rule.

src/libvirt_daemon.syms

@@ -4,7 +4,6 @@
 
 # libvirt_internal.h
 virRegisterStateDriver;
-virStateActive;
 virStateCleanup;
 virStateInitialize;
 virStateReload;