Remove useless mathcore load

tutorials/math/mathcoreStatFunc.C

@@ -19,7 +19,7 @@
 #include "TCanvas.h"
 
 void mathcoreStatFunc() {
-   gSystem->Load("libMathCore");
+
    TF2 *f1a = new TF2("f1a","ROOT::Math::cauchy_pdf(x, y)",0,10,0,10);
    TF2 *f2a = new TF2("f2a","ROOT::Math::chisquared_pdf(x,y)",0,20, 0,20);
    TF2 *f3a = new TF2("f3a","ROOT::Math::gaussian_pdf(x,y)",0,10,0,5);