test: Remove sanitizer suppression implicit-signed-integer-truncation:netaddress.cpp

This reverts commit fa86528.

This was fixed in commit efd6f90.

Author: MarcoFalke

test/sanitizer_suppressions/ubsan

@@ -91,7 +91,6 @@ implicit-signed-integer-truncation:leveldb/
 implicit-signed-integer-truncation:miner.cpp
 implicit-signed-integer-truncation:net.cpp
 implicit-signed-integer-truncation:net_processing.cpp
-implicit-signed-integer-truncation:netaddress.cpp
 implicit-signed-integer-truncation:streams.h
 implicit-signed-integer-truncation:test/arith_uint256_tests.cpp
 implicit-signed-integer-truncation:test/skiplist_tests.cpp