[lex.string] Remove link to non-existing "zero, null" index entry.

Eelis · tkoeppe · commit b96fcafef1d4 · 2022-12-16T21:56:41.000Z
diff --git a/source/lex.tex b/source/lex.tex
@@ -2075,7 +2075,6 @@
 \end{note}
 
 \pnum
-\indextext{\idxcode{0}|seealso{zero, null}}%
 \indextext{\idxcode{0}!string terminator}%
 \indextext{\idxcode{0}!null character|see {character, null}}%
 String literal objects are initialized with
