Revert "Add cflags Wno-error"

This reverts commit d6e7630bf2.

debian/patches/pve/0013-add-cflags.patch

@@ -1,16 +0,0 @@
-diff --git a/Makefile.orig b/Makefile
-index cc23c329111e..28c526aac06c 100644
---- a/Makefile.orig
-+++ b/Makefile
-@@ -951,6 +951,11 @@ include scripts/Makefile.kasan
- include scripts/Makefile.extrawarn
- include scripts/Makefile.ubsan
- 
-+KBUILD_CFLAGS	+= -Wno-format-truncation
-+KBUILD_CFLAGS	+= -Wno-array-bounds
-+KBUILD_CFLAGS	+= -Wno-stringop-overflow
-+KBUILD_CLFAGS	+= -Wno-compare-distinct-pointer-types
-+
- # Add user supplied CPPFLAGS, AFLAGS and CFLAGS as the last assignments
- KBUILD_CPPFLAGS += $(KCPPFLAGS)
- KBUILD_AFLAGS   += $(KAFLAGS)

debian/patches/series.linux

@@ -10,4 +10,3 @@ pve/0009-NFSv4-pnfs-Fix-a-use-after-free-bug-in-open.patch
 pve/0010-scsi-Revert-scsi-qla2xxx-Fix-disk-failure-to-redisco.patch
 pve/0011-ext4-recover-csum-seed-of-tmp_inode-after-migrating-.patch
 pve/0012-drm-i915-gt-Serialize-TLB-invalidates-with-GT-resets.patch
-pve/0013-add-cflags.patch