This is a title added because you specified a ROC statement, and is not controlled by the "title;" statement. The trick is to use PROC DOCUMENT to store the plot, then replay it and remove the title with OBSTITLE:
ods graphics on;
ods select roccurve;
ods noproctitle;
ods document name=myroc(write);
proc logistic data=have;
model resp = pred / nofit;
roc "have" pred = pred;
run;
ods document close;
ods graphics on;
proc document name=myroc;
obstitle \Logistic#1\ROC1#1\ROCCurve#1;
replay \Logistic#1\ROC1#1\ROCCurve#1;
quit;
ods graphics off;
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