waybar-mpris: cleanup Go flags

- fix strip flags by setting as ldflags
- remove `-trimpath`, this is set by buildGoModule
- remove `-modcacherw`, `-mod=readonly`, `-linkmode=external`
  as flags had no effect (check hash of binary when removing)
- remove `-buildmode=pie` (not sure why we would need a PIE here)

pkgs/by-name/wa/waybar-mpris/package.nix

@@ -18,9 +18,10 @@ buildGoModule {
 
   nativeBuildInputs = [ installShellFiles ];
 
-  CGO_LDFLAGS = "-s -w";
-
-  GOFLAGS = "-buildmode=pie -trimpath -ldflags=-linkmode=external -mod=readonly -modcacherw";
+  ldflags = [
+    "-s"
+    "-w"
+  ];
 
   meta = with lib; {
     description = "A waybar component/utility for displaying and controlling MPRIS2 compliant media players individually";
@@ -30,4 +31,3 @@ buildGoModule {
     maintainers = with maintainers; [ khaneliman ];
   };
 }
-