Further cleaning of Pixel han-config file

Cleaning of unused algorithms/thresholds done through multiple iterations of the "han-config-check.sh" script.

Initial iteration reported:

han-config-check.sh: collisions_run.config: Checking for objects that are defined but not used (these are safe but clutter files)... algorithm InDetGlobal_Pix_Npix_CheckHisto_Mean&GatherData algorithm InDetGlobal_Pix_ToT_CheckHisto_Mean&GatherData algorithm InDetGlobal_Pix_ntrk_LB_CheckHisto_Mean&GatherData algorithm PixTrack_Noise_CheckHisto_Mean&GatherData algorithm Pix_BCID_GreaterThan_Threshold&BinPrint algorithm Pix_BCID_NoEmptyBins algorithm Pix_BinPrint algorithm Pix_Bins_Diff_FromAvg algorithm Pix_Clusters_Column_LB algorithm Pix_Clusters_Row_LB algorithm Pix_DisabledLB_CheckHisto_Mean&GatherData algorithm Pix_Disabled_Synch_Errors algorithm Pix_HitTiming_CheckHisto_Mean&BinPrint algorithm Pix_Noise_CheckHisto_Mean&GatherData algorithm Pix_Npix_CheckHisto_Mean&GatherData algorithm Pix_ToT_CheckHisto_Mean&GatherData algorithm Pix_track_z0_CheckHisto_Mean&GatherData thresholds Pix_Cluster_Noise_Thresh thresholds Pix_Cluster_Noise_lumi_Thresh thresholds Pix_Hits_Noise_Thresh thresholds Pix_Hits_Noise_lumi_Thresh thresholds Pix_LB_Diff_FromAvg thresholds Pix_Npix_CheckMean_Thresh

Final iteration:

han-config-check.sh: collisions_run.config: Checking for objects that are defined but not used (these are safe but clutter files)... done

Tagging @ytakubo