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diff --git a/external-libs/pcre/doc/pcre_get_stringnumber.3 b/external-libs/pcre/doc/pcre_get_stringnumber.3
deleted file mode 100644
index f6c9357f..00000000
--- a/external-libs/pcre/doc/pcre_get_stringnumber.3
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-.TH PCRE 3
-.SH NAME
-PCRE - Perl-compatible regular expressions
-.SH SYNOPSIS
-.rs
-.sp
-.B #include <pcre.h>
-.PP
-.SM
-.br
-.B int pcre_get_stringnumber(const pcre *\fIcode\fR,
-.ti +5n
-.B const char *\fIname\fR);
-
-.SH DESCRIPTION
-.rs
-.sp
-This convenience function finds the number of a named substring capturing
-parenthesis in a compiled pattern. Its arguments are:
-
-  \fIcode\fR    Compiled regular expression
-  \fIname\fR    Name whose number is required
-
-The yield of the function is the number of the parenthesis if the name is
-found, or PCRE_ERROR_NOSUBSTRING otherwise.
-
-There is a complete description of the PCRE API in the
-.\" HREF
-\fBpcreapi\fR
-.\"
-page.