Remove unused release-fast profile (#3473)

# Description of Changes

Remove this custom build profile that was the same as `release`.

# API and ABI breaking changes

None

# Expected complexity level and risk

1

# Testing

None

Co-authored-by: Zeke Foppa <bfops@users.noreply.github.com>

Author: bfops

Cargo.toml

@@ -66,10 +66,6 @@ incremental = false
 codegen-units = 16
 rpath = false
 
-[profile.release-fast]
-inherits = "release"
-lto = "thin"
-
 [profile.dev]
 opt-level = 0
 debug = true