Merge pull request #595 from andyzhangx/remove-20H2

cleanup: remove 20H2 windows image build

Makefile

@@ -47,14 +47,14 @@ ALL_OS = linux windows
 ALL_ARCH.linux = arm64 amd64 ppc64le
 ALL_OS_ARCH.linux = linux-arm64 linux-arm-v7 linux-amd64 linux-ppc64le
 ALL_ARCH.windows = amd64
-ALL_OSVERSIONS.windows := 1809 20H2 ltsc2022
+ALL_OSVERSIONS.windows := 1809 ltsc2022
 ALL_OS_ARCH.windows = $(foreach arch, $(ALL_ARCH.windows), $(foreach osversion, ${ALL_OSVERSIONS.windows}, windows-${osversion}-${arch}))
 ALL_OS_ARCH = $(foreach os, $(ALL_OS), ${ALL_OS_ARCH.${os}})
 
 # The current context of image building
 # The architecture of the image
 ARCH ?= amd64
-# OS Version for the Windows images: 1809, 1903, 1909, 2004
+# OS Version for the Windows images: 1809, ltsc2022
 OSVERSION ?= 1809
 # Output type of docker buildx build
 OUTPUT_TYPE ?= registry