Remove references to alDopplerVelocity

Let's load driver even if it doesn't have the deprecated alDopplerVelocity.

code/client/qal.c

@@ -83,7 +83,6 @@ LPALBUFFERDATA qalBufferData;
 LPALGETBUFFERF qalGetBufferf;
 LPALGETBUFFERI qalGetBufferi;
 LPALDOPPLERFACTOR qalDopplerFactor;
-LPALDOPPLERVELOCITY qalDopplerVelocity;
 LPALSPEEDOFSOUND qalSpeedOfSound;
 LPALDISTANCEMODEL qalDistanceModel;
 
@@ -202,7 +201,6 @@ qboolean QAL_Init(const char *libname)
 	qalGetBufferf = GPA("alGetBufferf");
 	qalGetBufferi = GPA("alGetBufferi");
 	qalDopplerFactor = GPA("alDopplerFactor");
-	qalDopplerVelocity = GPA("alDopplerVelocity");
 	qalSpeedOfSound = GPA("alSpeedOfSound");
 	qalDistanceModel = GPA("alDistanceModel");
 
@@ -302,7 +300,6 @@ void QAL_Shutdown( void )
 	qalGetBufferf = NULL;
 	qalGetBufferi = NULL;
 	qalDopplerFactor = NULL;
-	qalDopplerVelocity = NULL;
 	qalSpeedOfSound = NULL;
 	qalDistanceModel = NULL;