Revert "Temporarily set opt-level = 1 for debug builds"

This reverts commit 18469a1 because
blocking issue #683 has now been resolved.

Cargo.toml

@@ -45,13 +45,6 @@ asm = []
 bitdepth_8 = []
 bitdepth_16 = []
 
-[profile.dev]
-# FIXME: The unoptimized build is currently broken since macros generate references
-# to 16bpc variants of assembly routines although only 8bpc versions exist. Until then
-# debugging will not work correctly. Remove once problem described here is resolved
-# https://github.com/memorysafety/rav1d/pull/613#issuecomment-1846949481
-opt-level = 1
-
 [profile.opt-dev]
 # The debug builds run tests very slowly so this profile keeps debug assertions
 # while enabling basic optimizations. The profile is not suitable for debugging.