b=383960, moz cairo: no longer needed: fbcompose-bandaid.patch

gfx/cairo/README

@@ -24,8 +24,6 @@ Some specific things:
 
 max-font-size.patch: Clamp freetype font size to 1000 to avoid overflow issues
 
-fbcompose-bandaid.patch: Disable "optimized" code in non-MMX case due to bugs
-
 quartz-glyph-rounding.patch: Round glyph positions, not advances, to float
 
 win32-scaled-font-size.patch: Add cairo_win32_font_face_create_for_logfontw_hfont,