This reverts commit 5cdb8c0c88.
This pattern is producing incorrect IR. For example,
```mlir
func.func @extract_subvector_from_constant_mask() -> vector<16xi1> {
%mask = vector.constant_mask [2, 3] : vector<16x16xi1>
%extract = vector.extract %mask[8] : vector<16xi1> from vector<16x16xi1>
return %extract : vector<16xi1>
}
```
Canonicalizes to
```mlir
func.func @extract_subvector_from_constant_mask() -> vector<16xi1> {
%0 = vector.constant_mask [3] : vector<16xi1>
return %0 : vector<16xi1>
}
```
Where it should be a zero mask because the extraction index (8) is
greater than the constant mask size along that dim (2).
6067129fbe