Core/Misc: Remove redundant null pointer checks before delete (#24140)

* Identified by clang-tidy readability-delete-null-pointer

src/server/game/Guilds/Guild.cpp

@@ -2400,9 +2400,12 @@ void Guild::DeleteMember(SQLTransaction& trans, ObjectGuid guid, bool isDisbandi
     // Call script on remove before member is actually removed from guild (and database)
     sScriptMgr->OnGuildRemoveMember(this, player, isDisbanding, isKicked);
 
-    if (Member* member = GetMember(guid))
-        delete member;
-    m_members.erase(lowguid);
+    auto memberItr = m_members.find(guid);
+    if (memberItr != m_members.end())
+    {
+        delete memberItr->second;
+        m_members.erase(memberItr);
+    }
 
     // If player not online data in data field will be loaded from guild tabs no need to update it !!
     if (player)

src/tools/map_extractor/loadlib.cpp

@@ -75,7 +75,7 @@ bool FileLoader::prepareLoadedData()
 
 void FileLoader::free()
 {
-    if (data) delete[] data;
+    delete[] data;
     data = 0;
     data_size = 0;
     version = 0;

src/tools/map_extractor/mpq_libmpq.cpp

@@ -122,7 +122,7 @@ void MPQFile::seekRelative(int offset)
 
 void MPQFile::close()
 {
-    if (buffer) delete[] buffer;
+    delete[] buffer;
     buffer = 0;
     eof = true;
 }

src/tools/vmap4_extractor/mpq_libmpq.cpp

@@ -128,7 +128,7 @@ void MPQFile::seekRelative(int offset)
 
 void MPQFile::close()
 {
-    if (buffer) delete[] buffer;
+    delete[] buffer;
     buffer = 0;
     eof = true;
 }