sim: Remove profile config from mcuboot-sys
Having profile configuration in sub crates generates a warning every
time Cargo is run.  Remove these lines, as the top-level Cargo.toml file
defines these values.
@@ -91,8 +91,3 @@ cc = "1.0.25"
libc = "0.2"
log = "0.4"
simflash = { path = "../simflash" }
-
-# Optimize some, even when building for debugging, otherwise the tests
-# are too slow.
-[profile.test]
-opt-level = 1
