Remove lint clippy::suboptimal_flops

suboptimal_flops suggest rewriting code in a style that
is less readable (e.g. with mul_add) for very thin benefit
(better rounding error *on some platforms*).

See for instance EmbarkStudios/puffin@9bd18e6

I find it a net loss, so I make this PR to solicit other opinions.

Related: rust-lang/rust-clippy#6867

Author: emilk

lints.rs

@@ -36,10 +36,9 @@
     clippy::pub_enum_variant_names,
     clippy::ref_option_ref,
     clippy::rest_pat_in_fully_bound_structs,
-    clippy::string_add_assign,    
+    clippy::string_add_assign,
     clippy::string_add,
     clippy::string_to_string,
-    clippy::suboptimal_flops,
     clippy::todo,
     clippy::unimplemented,
     clippy::unnested_or_patterns,
@@ -51,4 +50,4 @@
 )]
 // END - Embark standard lints v0.3
 // crate-specific exceptions:
-#![allow()]
+#![allow()]