diff --git a/internal/cgen/base/image-public.h b/internal/cgen/base/image-public.h
index b17d55e..4ca47de 100644
--- a/internal/cgen/base/image-public.h
+++ b/internal/cgen/base/image-public.h
@@ -736,28 +736,6 @@
 
 // --------
 
-// Deprecated: use wuffs_base__pixel_blend instead.
-//
-// wuffs_base__animation_blend encodes, for an animated image, how to blend the
-// transparent pixels of this frame with the existing canvas. In Porter-Duff
-// compositing operator terminology:
-//  - 0 means the frame may be transparent, and should be blended "src over
-//    dst", also known as just "over".
-//  - 1 means the frame may be transparent, and should be blended "src".
-//  - 2 means the frame is completely opaque, so that "src over dst" and "src"
-//    are equivalent.
-//
-// These semantics are conservative. It is valid for a completely opaque frame
-// to have a blend value other than 2.
-typedef uint8_t wuffs_base__animation_blend;
-
-#define WUFFS_BASE__ANIMATION_BLEND__SRC_OVER_DST \
-  ((wuffs_base__animation_blend)0)
-#define WUFFS_BASE__ANIMATION_BLEND__SRC ((wuffs_base__animation_blend)1)
-#define WUFFS_BASE__ANIMATION_BLEND__OPAQUE ((wuffs_base__animation_blend)2)
-
-// --------
-
 // wuffs_base__animation_disposal encodes, for an animated image, how to
 // dispose of a frame after displaying it:
 //  - None means to draw the next frame on top of this one.
diff --git a/internal/cgen/data/data.go b/internal/cgen/data/data.go
index 37917a9..19266fe 100644
--- a/internal/cgen/data/data.go
+++ b/internal/cgen/data/data.go
@@ -148,8 +148,6 @@
 	"\n\n#ifdef __cplusplus\n\ninline void  //\nwuffs_base__image_config::set(uint32_t pixfmt_repr,\n                              uint32_t pixsub_repr,\n                              uint32_t width,\n                              uint32_t height,\n                              uint64_t first_frame_io_position,\n                              bool first_frame_is_opaque) {\n  wuffs_base__image_config__set(this, pixfmt_repr, pixsub_repr, width, height,\n                                first_frame_io_position, first_frame_is_opaque);\n}\n\ninline void  //\nwuffs_base__image_config::invalidate() {\n  wuffs_base__image_config__invalidate(this);\n}\n\ninline bool  //\nwuffs_base__image_config::is_valid() const {\n  return wuffs_base__image_config__is_valid(this);\n}\n\ninline uint64_t  //\nwuffs_base__image_config::first_frame_io_position() const {\n  return wuffs_base__image_config__first_frame_io_position(this);\n}\n\ninline bool  //\nwuffs_base__image_config::first_frame_is_opaque() const {\n  return wuffs_base__image_config__first_frame_is_opaque(t" +
 	"his);\n}\n\n#endif  // __cplusplus\n\n" +
 	"" +
-	"// --------\n\n// Deprecated: use wuffs_base__pixel_blend instead.\n//\n// wuffs_base__animation_blend encodes, for an animated image, how to blend the\n// transparent pixels of this frame with the existing canvas. In Porter-Duff\n// compositing operator terminology:\n//  - 0 means the frame may be transparent, and should be blended \"src over\n//    dst\", also known as just \"over\".\n//  - 1 means the frame may be transparent, and should be blended \"src\".\n//  - 2 means the frame is completely opaque, so that \"src over dst\" and \"src\"\n//    are equivalent.\n//\n// These semantics are conservative. It is valid for a completely opaque frame\n// to have a blend value other than 2.\ntypedef uint8_t wuffs_base__animation_blend;\n\n#define WUFFS_BASE__ANIMATION_BLEND__SRC_OVER_DST \\\n  ((wuffs_base__animation_blend)0)\n#define WUFFS_BASE__ANIMATION_BLEND__SRC ((wuffs_base__animation_blend)1)\n#define WUFFS_BASE__ANIMATION_BLEND__OPAQUE ((wuffs_base__animation_blend)2)\n\n" +
-	"" +
 	"// --------\n\n// wuffs_base__animation_disposal encodes, for an animated image, how to\n// dispose of a frame after displaying it:\n//  - None means to draw the next frame on top of this one.\n//  - Restore Background means to clear the frame's dirty rectangle to \"the\n//    background color\" (in practice, this means transparent black) before\n//    drawing the next frame.\n//  - Restore Previous means to undo the current frame, so that the next frame\n//    is drawn on top of the previous one.\ntypedef uint8_t wuffs_base__animation_disposal;\n\n#define WUFFS_BASE__ANIMATION_DISPOSAL__NONE ((wuffs_base__animation_disposal)0)\n#define WUFFS_BASE__ANIMATION_DISPOSAL__RESTORE_BACKGROUND \\\n  ((wuffs_base__animation_disposal)1)\n#define WUFFS_BASE__ANIMATION_DISPOSAL__RESTORE_PREVIOUS \\\n  ((wuffs_base__animation_disposal)2)\n\n" +
 	"" +
 	"// --------\n\ntypedef struct wuffs_base__frame_config__struct {\n  // Do not access the private_impl's fields directly. There is no API/ABI\n  // compatibility or safety guarantee if you do so.\n  struct {\n    wuffs_base__rect_ie_u32 bounds;\n    wuffs_base__flicks duration;\n    uint64_t index;\n    uint64_t io_position;\n    wuffs_base__animation_disposal disposal;\n    bool opaque_within_bounds;\n    bool overwrite_instead_of_blend;\n    wuffs_base__color_u32_argb_premul background_color;\n  } private_impl;\n\n#ifdef __cplusplus\n  inline void set(wuffs_base__rect_ie_u32 bounds,\n                  wuffs_base__flicks duration,\n                  uint64_t index,\n                  uint64_t io_position,\n                  wuffs_base__animation_disposal disposal,\n                  bool opaque_within_bounds,\n                  bool overwrite_instead_of_blend,\n                  wuffs_base__color_u32_argb_premul background_color);\n  inline wuffs_base__rect_ie_u32 bounds() const;\n  inline uint32_t width() const;\n  inline uint32_t hei" +
diff --git a/release/c/wuffs-unsupported-snapshot.c b/release/c/wuffs-unsupported-snapshot.c
index 5217c13..946dad3 100644
--- a/release/c/wuffs-unsupported-snapshot.c
+++ b/release/c/wuffs-unsupported-snapshot.c
@@ -3493,28 +3493,6 @@
 
 // --------
 
-// Deprecated: use wuffs_base__pixel_blend instead.
-//
-// wuffs_base__animation_blend encodes, for an animated image, how to blend the
-// transparent pixels of this frame with the existing canvas. In Porter-Duff
-// compositing operator terminology:
-//  - 0 means the frame may be transparent, and should be blended "src over
-//    dst", also known as just "over".
-//  - 1 means the frame may be transparent, and should be blended "src".
-//  - 2 means the frame is completely opaque, so that "src over dst" and "src"
-//    are equivalent.
-//
-// These semantics are conservative. It is valid for a completely opaque frame
-// to have a blend value other than 2.
-typedef uint8_t wuffs_base__animation_blend;
-
-#define WUFFS_BASE__ANIMATION_BLEND__SRC_OVER_DST \
-  ((wuffs_base__animation_blend)0)
-#define WUFFS_BASE__ANIMATION_BLEND__SRC ((wuffs_base__animation_blend)1)
-#define WUFFS_BASE__ANIMATION_BLEND__OPAQUE ((wuffs_base__animation_blend)2)
-
-// --------
-
 // wuffs_base__animation_disposal encodes, for an animated image, how to
 // dispose of a frame after displaying it:
 //  - None means to draw the next frame on top of this one.