Drop valgrind suppressions

These suppressions are not required as we are either using openssl with
PURITY enabled or valgrind suppressions are system defined (Debian).

Makefile.dir

 UPDATER_VERSION := $(shell (git describe --match 'v*' --dirty || echo 'unknown') | sed -e 's/^v//')
 
 LUA_NAME := $(shell for lua in lua5.1 lua-5.1 lua51 lua ; do if pkg-config $$lua ; then echo $$lua ; break ; fi ; done)
-VALGRIND:=IN_VALGRIND=1 valgrind --leak-check=full --show-leak-kinds=all --track-fds=yes --trace-children=no --child-silent-after-fork=yes --error-exitcode=1 --track-origins=yes --suppressions=$(S)/tests/valgrind.supp
+VALGRIND:=IN_VALGRIND=1 valgrind --leak-check=full --show-leak-kinds=all --track-fds=yes --trace-children=no --child-silent-after-fork=yes --error-exitcode=1 --track-origins=yes
 # For picosat, it otherwise needs some headers not available on musl for a feature we don't need. And we need trace enabled.
 EXTRA_DEFINES := NGETRUSAGE TRACE UPDATER_VERSION='"$(UPDATER_VERSION)"'
 ifdef BUSYBOX_EXEC

tests/valgrind.supp

-# This ignores leaks in openssl (libcrypto). We can't do anything else with it.
-{
-   libcrypto_leaks
-   Memcheck:Leak
-   ...
-   obj:*/libcrypto.so.*
-}