fix ref problem - url and doi is not needed

LaTeX2e+Proceedings+Templates+download/main.blg

@@ -7,16 +7,16 @@ Reallocating 'name_of_file' (item size: 1) to 11 items.
 Database file #1: references.bib
 You've used 45 entries,
             2850 wiz_defined-function locations,
-            919 strings with 18435 characters,
-and the built_in function-call counts, 34400 in all, are:
-= -- 2785
+            862 strings with 15679 characters,
+and the built_in function-call counts, 33915 in all, are:
+= -- 2700
 > -- 1365
 < -- 60
 + -- 534
 - -- 488
-* -- 2411
-:= -- 4311
-add.period$ -- 109
+* -- 2256
+:= -- 4201
+add.period$ -- 84
 call.type$ -- 45
 change.case$ -- 392
 chr.to.int$ -- 0
@@ -24,13 +24,13 @@ cite$ -- 45
 duplicate$ -- 2949
 empty$ -- 2813
 format.name$ -- 546
-if$ -- 7511
+if$ -- 7426
 int.to.chr$ -- 0
 int.to.str$ -- 45
 missing$ -- 645
 newline$ -- 141
 num.names$ -- 120
-pop$ -- 1153
+pop$ -- 1213
 preamble$ -- 1
 purify$ -- 294
 quote$ -- 0
@@ -45,4 +45,4 @@ type$ -- 180
 warning$ -- 0
 while$ -- 224
 width$ -- 47
-write$ -- 561
+write$ -- 476