env/linux-arm64-bullseye: remove gpg from container images

The tests which require gpg and gpg-agent have been removed. This
change removes them from the container images.

For golang/go#57034

Change-Id: Id33dbc9881bb9a688955612a66f1f549822f3866
Reviewed-on: https://go-review.googlesource.com/c/build/+/455860
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Carlos Amedee <carlos@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>

env/linux-arm64-bullseye/Dockerfile

@@ -14,7 +14,6 @@ ENV DEBIAN_FRONTEND noninteractive
 # gdb: optionally used by runtime tests for gdb
 # gfortran: for compiling cgo with fortran support (multilib for 386)
 # git: git VCS supported by cmd/go
-# gpg: the presence of a gpg binary can influence git behavior for cmd/go tests
 # libc6-dev: for building Go's bootstrap 'dist' prog
 # libgles2-mesa-dev: required by x/mobile repo
 # libopenal-dev: required by x/mobile repo
@@ -38,8 +37,6 @@ RUN apt-get update && apt-get install -y \
 	gdb \
 	gfortran \
 	git \
-	gpg \
-	gpg-agent \
 	iptables \
 	libc6-dev \
 	libgles2-mesa-dev \

env/linux-x86-bullseye/Dockerfile

@@ -17,7 +17,6 @@ ENV DEBIAN_FRONTEND noninteractive
 # gdb: optionally used by runtime tests for gdb
 # gfortran: for compiling cgo with fortran support (multilib for 386)
 # git: git VCS supported by cmd/go
-# gpg: the presence of a gpg binary can influence git behavior for cmd/go tests
 # libc6-dev-i386: for 32-bit builds
 # libc6-dev: for building Go's bootstrap 'dist' prog
 # libgles2-mesa-dev: required by x/mobile repo
@@ -44,8 +43,6 @@ RUN apt-get update && apt-get install -y \
 	gfortran \
 	gfortran-multilib \
 	git \
-	gpg \
-	gpg-agent \
 	iptables \
 	libc6-dev \
 	libc6-dev-i386 \