Fix unused warnings

indra/newview/llmanip.cpp

@@ -561,9 +561,6 @@ void LLManip::renderTickValue(const LLVector3& pos, F32 value, const std::string
 			gGL.scalef(inv_zoom_amt, inv_zoom_amt, inv_zoom_amt);
 		}
 
-		LLColor4 shadow_color = LLColor4::black;
-		shadow_color.mV[VALPHA] = color.mV[VALPHA] * 0.5f;
-
 		if (fractional_portion != 0)
 		{
 			fraction_string = llformat("%c%02d%s", LLResMgr::getInstance()->getDecimalPoint(), fractional_portion, suffix.c_str());