LibFileSystem+Everything: Remove resolve_executable_from_environment

Author: https://github.com/BenWiederhake
Commit: f20d04726a
Pull-request: https://github.com/SerenityOS/serenity/pull/19135
Issue: https://github.com/SerenityOS/serenity/issues/18804
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/timschumi

Userland/Libraries/LibFileSystem/FileSystem.h

@@ -73,7 +73,6 @@ bool can_delete_or_move(StringView path);
 ErrorOr<String> read_link(StringView link_path);
 ErrorOr<void> link_file(StringView destination_path, StringView source_path);
 
-ErrorOr<String> resolve_executable_from_environment(StringView filename, int flags = 0);
 bool looks_like_shared_library(StringView path);
 
 }