go: Avoid setting excludedPackages for package already being excluded by default

pkgs/development/tools/go-motion/default.nix

@@ -9,7 +9,6 @@ buildGoPackage rec {
   rev = "218875ebe23806e7af82f3b5b14bb3355534f679";
 
   goPackagePath = "github.com/fatih/motion";
-  excludedPackages = "testdata";
 
   src = fetchFromGitHub {
     inherit rev;

pkgs/development/tools/gocode-gomod/default.nix

@@ -9,8 +9,6 @@ buildGoModule rec {
   # standard packages.
   allowGoReference = true;
 
-  excludedPackages = "internal/suggest/testdata";
-
   src = fetchFromGitHub {
     owner = "stamblerre";
     repo = "gocode";

pkgs/development/tools/gocode/default.nix

@@ -6,7 +6,6 @@ buildGoPackage rec {
   rev = "4acdcbdea79de6b3dee1c637eca5cbea0fdbe37c";
 
   goPackagePath = "github.com/mdempsky/gocode";
-  excludedPackages = "internal/suggest/testdata";
 
   # we must allow references to the original `go` package,
   # because `gocode` needs to dig into $GOROOT to provide completions for the

pkgs/development/tools/gogetdoc/default.nix

@@ -12,8 +12,6 @@ buildGoModule rec {
 
   doCheck = false;
 
-  excludedPackages = "\\(testdata\\)";
-
   src = fetchFromGitHub {
     inherit rev;
 

pkgs/development/tools/golint/default.nix

@@ -5,8 +5,6 @@ buildGoModule rec {
   version = "20201208-${lib.strings.substring 0 7 rev}";
   rev = "83fdc39ff7b56453e3793356bcff3070b9b96445";
 
-  excludedPackages = "testdata";
-
   # we must allow references to the original `go` package, as golint uses
   # compiler go/build package to load the packages it's linting.
   allowGoReference = true;

pkgs/development/tools/gotools/default.nix

@@ -40,7 +40,7 @@ buildGoModule rec {
   '';
 
   excludedPackages = "\\("
-    + lib.concatStringsSep "\\|" ([ "testdata" "vet" "cover" ])
+    + lib.concatStringsSep "\\|" ([ "vet" "cover" ])
     + "\\)";
 
   # Set GOTOOLDIR for derivations adding this to buildInputs

pkgs/development/tools/ineffassign/default.nix

@@ -9,7 +9,6 @@ buildGoPackage rec {
   rev = "1003c8bd00dc2869cb5ca5282e6ce33834fed514";
 
   goPackagePath = "github.com/gordonklaus/ineffassign";
-  excludedPackages = "testdata";
 
   src = fetchFromGitHub {
     inherit rev;

pkgs/development/tools/interfacer/default.nix

@@ -9,7 +9,6 @@ buildGoPackage rec {
   rev = "c20040233aedb03da82d460eca6130fcd91c629a";
 
   goPackagePath = "mvdan.cc/interfacer";
-  excludedPackages = "check/testdata";
 
   src = fetchFromGitHub {
     inherit rev;