Revert "Ignore Dense sparsity config (#169)" (#181)

Author: rahul-tuli

src/compressed_tensors/compressors/model_compressors/model_compressor.py

@@ -242,10 +242,6 @@ def __init__(
         self.sparsity_compressor = None
         self.quantization_compressor = None
 
-        if sparsity_config and sparsity_config.format == CompressionFormat.dense.value:
-            # ignore dense sparsity config
-            self.sparsity_config = None
-
         if sparsity_config is not None:
             self.sparsity_compressor = BaseCompressor.load_from_registry(
                 sparsity_config.format, config=sparsity_config