Revert "Build with v2 extensions" / GOAMD64=v2

As seen in https://github.com/rfjakob/gocryptfs/issues/908,
there are users still running x86-64-v1 cpus. They get

	This program can only be run on AMD64 processors
	with v2 microarchitecture support.

and cannot read their encrypted files.

Build for AMD64v1 again an accept the XChaCha20 performance hit for
for some cpus ( https://github.com/golang/go/issues/67240 ).

This reverts commit f5007b28c366d1a9671146710975679a154f30f8.

Related:
https://github.com/rfjakob/gocryptfs/issues/828
https://github.com/rfjakob/gocryptfs/pull/833
https://github.com/apptainer/apptainer/issues/2873
https://github.com/golang/go/issues/67240

1 files changed, 0 insertions, 3 deletions

diff --git a/build.bash b/build.bash
index ffdd307..5e95c3e 100755
--- a/build.bash
+++ b/build.bash
@@ -85,9 +85,6 @@ if [[ -n ${LDFLAGS:-} ]] ; then
 	GO_LDFLAGS="$GO_LDFLAGS \"-extldflags=$LDFLAGS\""
 fi
 
-# Set GOAMD64 version to v2
-export GOAMD64=v2
-
 # Actual "go build" call for gocryptfs
 go build "-ldflags=$GO_LDFLAGS" "$@"
 # Additional binaries