spidermonkey_91: unpin icu, drop yasm, refactor

Split the argument list into build and runtime dependencies and sort
everything alphabetically.

Unpin icu, it works with icu70, which is the latest version at this
time.

Remove yasm, it's not needed in firefox either.

pkgs/development/interpreters/spidermonkey/91.nix

@@ -1,20 +1,24 @@
-{ lib, stdenv
+{ lib
+, stdenv
 , fetchurl
-, pkg-config
+
+# build time
+, buildPackages
+, cargo
+, m4
 , perl
+, pkg-config
 , python3
-, zip
+, rust-cbindgen
-, buildPackages
+, rustc
 , which
+, zip
+
+# runtime
+, icu
+, nspr
 , readline
 , zlib
-, icu69
-, cargo
-, rustc
-, rust-cbindgen
-, yasm
-, nspr
-, m4
 }:
 
 stdenv.mkDerivation rec {
@@ -31,20 +35,19 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [
     cargo
-    rustc.llvmPackages.llvm # for llvm-objdump
+    m4
     perl
     pkg-config
     python3
     rust-cbindgen
     rustc
+    rustc.llvmPackages.llvm # for llvm-objdump
     which
-    yasm # to buid icu? seems weird
     zip
-    m4
   ];
 
   buildInputs = [
-    icu69
+    icu
     nspr
     readline
     zlib