[librsvg] Remove unused rsvg_css_parse_frequency() function.

[Federico Mena Quintero <federico src gnome org>]

commit 9d0b8f48831088c8defc120be9d061721bc85cfe
Author: Federico Mena Quintero <federico gnome org>
Date:   Thu Mar 23 11:08:45 2017 -0600

    Remove unused rsvg_css_parse_frequency() function.

 rsvg-css.c |   29 -----------------------------
 rsvg-css.h |    2 --
 2 files changed, 0 insertions(+), 31 deletions(-)
---
diff --git a/rsvg-css.c b/rsvg-css.c
index 588d042..75338ab 100644
--- a/rsvg-css.c
+++ b/rsvg-css.c
@@ -280,35 +280,6 @@ rsvg_css_parse_opacity (const char *str)
     return (guint) floor (opacity * 255. + 0.5);
 }
 
-/*
-  <frequency>: Frequency values are used with aural properties. The normative 
-  definition of frequency values can be found in [CSS2-AURAL]. A frequency 
-  value is a <number> immediately followed by a frequency unit identifier. 
-  Frequency unit identifiers are:
-
-    * Hz: Hertz
-    * kHz: kilo Hertz
-
-    Frequency values may not be negative.
-*/
-double
-rsvg_css_parse_frequency (const char *str)
-{
-    double f_hz;
-    char *end_ptr;
-
-    f_hz = g_ascii_strtod (str, &end_ptr);
-
-    /* todo: error condition - figure out how to best represent it */
-    if ((f_hz == -HUGE_VAL || f_hz == HUGE_VAL) && (ERANGE == errno))
-        return 0.0;
-
-    if (end_ptr && !strcmp (end_ptr, "kHz"))
-        return f_hz * 1000.;
-
-    return f_hz;
-}
-
 PangoStyle
 rsvg_css_parse_font_style (const char *str, gboolean * inherit)
 {
diff --git a/rsvg-css.h b/rsvg-css.h
index 56febeb..b916c5b 100644
--- a/rsvg-css.h
+++ b/rsvg-css.h
@@ -72,8 +72,6 @@ int       rsvg_css_parse_aspect_ratio     (const char *str);
 G_GNUC_INTERNAL
 guint       rsvg_css_parse_opacity         (const char *str);
 G_GNUC_INTERNAL
-double      rsvg_css_parse_frequency    (const char *str);
-G_GNUC_INTERNAL
 PangoStyle   rsvg_css_parse_font_style      (const char *str, gboolean * inherit);
 G_GNUC_INTERNAL
 PangoVariant rsvg_css_parse_font_variant    (const char *str, gboolean * inherit);