shader: remove unused function

This function was added but never used. Let's get rid of it.

Signed-off-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Fixes: 5d2dde4 ("strings: move to 3 strings, and patch extensions onto end of string 0 (v2)")
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>

src/vrend_shader.c

@@ -545,11 +545,6 @@ static void emit_ver_ext(struct dump_ctx *ctx, const char *buf)
    strbuf_append(&ctx->glsl_ver_ext, buf);
 }
 
-static void set_ver_ext_error(struct dump_ctx *ctx)
-{
-   strbuf_set_error(&ctx->glsl_ver_ext);
-}
-
 __attribute__((format(printf, 2, 3)))
 static void emit_ver_extf(struct dump_ctx *ctx, const char *fmt, ...)
 {