Drop miniupnpc from link lists (wownero builds without UPnP)

Wownero's build tree ships no libminiupnpc.a and none of its libraries
reference UPnP symbols, so FindMonero fails with
Xmr_MINIUPNPC_LIBRARY-NOTFOUND and the explorer will not link against
current wownero. Remove miniupnpc from the library lists in
CMakeLists.txt and cmake/FindMonero.cmake.

Build fix from lza_menace's wownero.patch (github.com/lalanza808).

Co-authored-by: lza_menace <lza_menace@protonmail.com>

CMakeLists.txt

@@ -158,8 +158,7 @@ set(LIBRARIES
         mnemonics
         easylogging
         checkpoints
-        cncrypto        
-        miniupnpc
+        cncrypto
         version
         epee
         hardforks

cmake/FindMonero.cmake

@@ -31,7 +31,7 @@
 set(LIBS common;blocks;cryptonote_basic;cryptonote_core;multisig;
 		cryptonote_protocol;daemonizer;mnemonics;epee;lmdb;device;wallet-crypto;
 		blockchain_db;ringct;wallet;cncrypto;easylogging;version;
-        checkpoints;randomx;hardforks;miniupnpc)
+        checkpoints;randomx;hardforks)
 
 set(Xmr_INCLUDE_DIRS "${CPP_MONERO_DIR}")