Remove unused FXRENDER_IMAGE_LOSSY definition.

That its prefix doesn't match its fellows might have been a strong
clue that it was never used nor updated.

Change-Id: Idfc21f59988e17b076d82d76009f78f661b17a90
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/80573
Auto-Submit: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/core/fxge/render_defines.h b/core/fxge/render_defines.h
index da3f344..fa63159 100644
--- a/core/fxge/render_defines.h
+++ b/core/fxge/render_defines.h
@@ -23,7 +23,6 @@
 #define FXRC_SOFT_CLIP 0x100
 #define FXRC_BITMASK_OUTPUT 0x400
 #define FXRC_BYTEMASK_OUTPUT 0x800
-#define FXRENDER_IMAGE_LOSSY 0x1000
 #define FXRC_FILLSTROKE_PATH 0x2000
 #define FXRC_SHADING 0x4000