Revert "go_1_18: backport CL417615"

This reverts commit 4d1e04c00f.

fixed in 1.18.5

pkgs/development/compilers/go/1.18.nix

@@ -1,6 +1,5 @@
 { lib
 , stdenv
-, fetchpatch
 , fetchurl
 , tzdata
 , iana-etc
@@ -173,11 +172,7 @@ stdenv.mkDerivation rec {
     touch $TMPDIR/group $TMPDIR/hosts $TMPDIR/passwd
   '';
 
-  patches = let
-    fetchBase64Patch = args: (fetchpatch args).overrideAttrs (o: {
-      postFetch = "mv $out p; base64 -d p > $out; " + o.postFetch;
-    });
-  in [
+  patches = [
     ./remove-tools-1.11.patch
     ./ssl-cert-file-1.16.patch
     ./remove-test-pie-1.15.patch
@@ -187,12 +182,6 @@ stdenv.mkDerivation rec {
     ./skip-nohup-tests.patch
     ./skip-cgo-tests-1.15.patch
     ./go_no_vendor_checks-1.16.patch
-
-    # https://go-review.googlesource.com/c/go/+/417615/
-    (fetchBase64Patch {
-      url = "https://go-review.googlesource.com/changes/go~417615/revisions/3/patch";
-      sha256 = "sha256-Gu5eZUwGGch7et75A/BNynbs4VlQUBClVUxjxPkdjOs=";
-    })
   ];
 
   postPatch = ''