fix!: remove references to context::collect

I forgor to do that earlier lol

Refs: #12

furvm/src/context.cpp

@@ -7,6 +7,4 @@ namespace furvm {
 context::context()
   : m_thingAllocator(m_thingArena) {}
 
-void context::collect() {}
-
 } // namespace furvm

furvm/src/main.cpp

@@ -29,10 +29,8 @@ int main(void) {
 
     static constexpr std::size_t FPC = 3; // Frames per collection
 
-    std::size_t count = 0;
     while ((executor->flags() & furvm::executor_flags::Done) != furvm::executor_flags::Done) {
         executor->step();
-        if ((++count % FPC) == 0) context->collect();
     }
 
     return 0;