sci-visualization/grace: remove unused patch

Closes: https://github.com/gentoo/gentoo/pull/5370

diff --git a/sci-visualization/grace/files/grace-5.1.22-libpng15.patch b/sci-visualization/grace/files/grace-5.1.22-libpng15.patch
deleted file mode 100644 (file)
index 1e27bb3..0000000
--- a/sci-visualization/grace/files/grace-5.1.22-libpng15.patch
+++ /dev/null
@@ -1,19 +0,0 @@
---- a/src/rstdrv.c
-+++ b/src/rstdrv.c
-@@ -53,6 +53,7 @@
- #endif
- 
- #ifdef HAVE_LIBPNG
-+#  include <zlib.h>
- #  include <png.h>
- #endif
- 
-@@ -885,7 +886,7 @@
-         return;
-     }
- 
--    if (setjmp(png_ptr->jmpbuf)) {
-+    if (setjmp(png_jmpbuf(png_ptr))) {
-         png_destroy_write_struct(&png_ptr, &info_ptr);
-         return;
-     }