temporarily remove multiprocessing until we have more work to do

Author: wjblanke

src/blockchain.py

@@ -688,6 +688,19 @@ async def validate_block(
     async def pre_validate_blocks(
         self, blocks: List[FullBlock]
     ) -> List[Tuple[bool, Optional[bytes32]]]:
+
+        results=[]
+        for block in blocks:
+            val, pos = self.pre_validate_block_multi(bytes(block))
+            if pos is not None:
+                pos = bytes32(pos)
+            results.append( (val, pos) )
+
+        return results
+
+    async def pre_validate_blocks_multiprocessing(
+        self, blocks: List[FullBlock]
+    ) -> List[Tuple[bool, Optional[bytes32]]]:
         futures = []
 
         cpu_count = multiprocessing.cpu_count()