[librsvg] rsvg_decode_data_uri(): Remove unused function

[Federico Mena Quintero <federico src gnome org>]

commit def3c5b38bea2eac2086a466ef549978ec86ce9a
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Nov 28 12:47:37 2018 -0600

    rsvg_decode_data_uri(): Remove unused function

 rsvg_internals/src/io.rs  | 39 +--------------------------------------
 rsvg_internals/src/lib.rs |  2 +-
 2 files changed, 2 insertions(+), 39 deletions(-)
---
diff --git a/rsvg_internals/src/io.rs b/rsvg_internals/src/io.rs
index 905a326d..a93c0b9e 100644
--- a/rsvg_internals/src/io.rs
+++ b/rsvg_internals/src/io.rs
@@ -20,9 +20,8 @@ use glib::{self, translate::*, Bytes as GBytes, Cast};
 use std::ptr;
 
 use allowed_url::AllowedUrl;
-use error::{set_gerror, LoadingError, RsvgError};
+use error::{LoadingError, RsvgError};
 use handle::BinaryData;
-use util::utf8_cstr;
 
 fn decode_data_uri(uri: &str) -> Result<BinaryData, LoadingError> {
     let data_url = data_url::DataUrl::process(uri).map_err(|_| LoadingError::BadDataUrl)?;
@@ -64,42 +63,6 @@ pub fn binary_data_to_glib(
     }
 }
 
-#[no_mangle]
-pub fn rsvg_decode_data_uri(
-    uri: *const libc::c_char,
-    out_mime_type: *mut *mut libc::c_char,
-    out_size: *mut usize,
-    error: *mut *mut glib_sys::GError,
-) -> *mut libc::c_char {
-    unsafe {
-        assert!(!out_size.is_null());
-
-        let uri = utf8_cstr(uri);
-
-        match decode_data_uri(uri) {
-            Ok(binary_data) => {
-                if !error.is_null() {
-                    *error = ptr::null_mut();
-                }
-
-                binary_data_to_glib(&binary_data, out_mime_type, out_size)
-            }
-
-            Err(_) => {
-                if !out_mime_type.is_null() {
-                    *out_mime_type = ptr::null_mut();
-                }
-
-                *out_size = 0;
-
-                set_gerror(error, 0, "could not decode data: URL");
-
-                ptr::null_mut()
-            }
-        }
-    }
-}
-
 // Header of a gzip data stream
 const GZ_MAGIC_0: u8 = 0x1f;
 const GZ_MAGIC_1: u8 = 0x8b;
diff --git a/rsvg_internals/src/lib.rs b/rsvg_internals/src/lib.rs
index 9149bdeb..fab96ef3 100644
--- a/rsvg_internals/src/lib.rs
+++ b/rsvg_internals/src/lib.rs
@@ -55,7 +55,7 @@ pub use handle::{
     rsvg_handle_rust_set_base_url,
 };
 
-pub use io::{rsvg_decode_data_uri, rsvg_get_input_stream_for_loading};
+pub use io::rsvg_get_input_stream_for_loading;
 
 pub use node::rsvg_node_unref;