Core/Misc: Remove redundant null pointer checks before delete (#2679)

Co-authored-by: Ujp8LfXBJ6wCPR <github@lillecarl.com>

Co-authored-by: Ujp8LfXBJ6wCPR <github@lillecarl.com>

src/tools/map_extractor/loadlib.cpp

@@ -64,7 +64,7 @@ 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

@@ -111,7 +111,7 @@ void MPQFile::seekRelative(int offset)
 
 void MPQFile::close()
 {
-    if (buffer) delete[] buffer;
+    delete[] buffer;
     buffer = 0;
     eof = true;
 }