remove deprecated generateStfSinglePencilBeam function

Author: wahln

examples/matRad_example13_fitAnalyticalParticleBaseData.m

@@ -167,7 +167,7 @@
 
 
 %% generate steering file
-stf = matRad_generateStfSinglePencilBeam(ct,cst,pln);
+stf = matRad_generateSingleBixelStf(ct,cst,pln);
 
 % Select existing BDL file to load and fit
 pln.loadExistingBDL = 'BDL_matRad.txt';